Consulta: subjectFacets:"Immunity"
Registros recuperados: 72
Data/hora: 01/06/2024 01:18:25

Modulación de la respuesta inmune de pollos de engorda mediante dietas suplementadas con arginina, vitamina e y manano-oligosacáridos.
Provedor de dados: 32
Autores: Chan Díaz, David Jesús.
Se realizaron dos experimentos para evaluar dietas suplementadas con arginina (ARG), vitamina E (VE) y manano-oligosacáridos (MOS) en la inmunidad de pollos. En el primero, 700 pollos (1 día de edad), fueron divididos en 28 grupos y recibieron una de cuatro dietas: T1 = 1.31 % ARG y 10 mg de VE/kg;  T2 = T1 + 0.3% de ARG; T3 = T1 + 70 mg de VE y T4 = T1 + 0.3 % ARG + 70 mg de VE. A los 12 días de edad, recibieron las vacunas contra Newcastle (EN), bronquitis, influenza (IA) y viruela; las variables evaluadas fueron la reacción postvacunal y la respuesta inmune. En el segundo experimento, 200 pollos (1 día de edad) fueron divididos en ocho tratamientos con arreglo factorial 2 x 4, los factores fueron: La vacuna contra coccidiosis (aplicada o no), y cuatro...
Palavras-chave: Inmunidad; Arginina; Vitamina E; MOS; Pollos de engorda; Arginine; Vitamin E; Broiler chickens; Immunity; Doctorado; Ganadería.
Ano: 2012
URL: http://hdl.handle.net/10521/673

Vaccines for finfish aquaculture: What do we need to know to make them work?
Provedor de dados: 69
Autores: Dixon,Brian.
Aquaculture still faces serious economic impacts due to the loss of animals to disease. A conservative estimate of 5% losses due to disease means that the finfish aquaculture industry loses over $1 billion annually on a global scale. One proven way to prevent costly disease outbreaks is to vaccinate fish against common or known pathogens. Current vaccination schemes still result in losses, however, and this may be due in part to vaccine design. Vaccines are currently designed using state of the art knowledge of immune responses, which is based primarily on mammalian studies. Just how applicable is this information to fish immunity and vaccine design, however? This review discusses what is currently known for teleost fish about two key processes that drive...
Tipo: Journal article
Palavras-chave: Antibody; Antigen presentation; Cloning; Cytokine; Immunity; Major histocompatibility complex receptors.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000500014

Molecular cloning and functional analysis of the fatty acid-binding protein (Sp-FABP) gene in the mud crab (Scylla paramamosain)
Provedor de dados: 74
Autores: Zeng,Xianglan; Ye,Haihui; Yang,Ya'nan; Wang,Guizhong; Huang,Huiyang.
Intracellular fatty acid-binding proteins (FABPs) are multifunctional cytosolic lipid-binding proteins found in vertebrates and invertebrates. In this work, we used RACE to obtain a full-length cDNA of Sp-FABP from the mud crab Scylla paramamosain. The open reading frame of the full length cDNA (886 bp) encoded a 136 amino acid polypeptide that showed high homology with related genes from other species. Real-time quantitative PCR identified variable levels of Sp-FABP transcripts in epidermis, eyestalk, gill, heart, hemocytes, hepatopancreas, muscle, ovary, stomach and thoracic ganglia. In ovaries, Sp-FABP expression increased gradually from stage I to stage IV of development and decreased in stage V. Sp-FABP transcripts in the hepatopancreas and hemocytes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fatty acid-binding protein; Immunity; Ovary development; Real-time quantitative PCR; Scylla paramamosain.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000100021

Alimento, nutrição e saúde em destaque.
Provedor de dados: 14
Autores: LOPES, M. A.
Hipócrates, o pai da medicina, observou, há 2.500 anos, que muitas doenças se originam da natureza e podem ser evitadas quando se estabelece um equilíbrio entre o meio ambiente, os alimentos ingeridos e o espírito. Seu principal ensinamento- "o alimento é o nosso melhor remédio" - ganha especial importância neste momento em que a pandemia de covid-19 ceifa vidas, destrói a atividade econômica e ameaça a sociedade de múltiplas formas.
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Pandemia; Covid-19; Coronavírus; Sistema imunológico humano; Nutrição Humana; Sistema de Alimentação; Imunidade; Alimento; Pandemic; Food consumption; Human nutrition; Immunity.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1123553

The new insights into the oyster antimicrobial defense: Cellular, molecular and genetic view
Provedor de dados: 5
Autores: Bachere, Evelyne; Rosa, Rafael Diego; Schmitt, Paulina; Poirier, Aurore; Merou, Nicolas; Charriere, Guillaume; Destoumieux-garzon, Delphine.
Oysters are sessile filter feeders that live in close association with abundant and diverse communities of microorganisms that form the oyster microbiota. In such an association, cellular and molecular mechanisms have evolved to maintain oyster homeostasis upon stressful conditions including infection and changing environments. We give here cellular and molecular insights into the Crassostrea gigas antimicrobial defense system with focus on antimicrobial peptides and proteins (AMPs). This review highlights the central role of the hemocytes in the modulation and control of oyster antimicrobial response. As vehicles for AMPs and other antimicrobial effectors, including reactive oxygen species (ROS), and together with epithelia, hemocytes provide the oyster...
Tipo: Text
Palavras-chave: Mollusk; Immunity; Antimicrobial peptide; Hemocyte; Defensin.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00254/36552/35097.pdf

Suppression substractive hybridisation (SSH) and real time PCR reveal differential gene expression in the Pacific cupped oyster, Crassostrea gigas, challenged with Ostreid herpesvirus 1
Provedor de dados: 5
Autores: Renault, Tristan; Faury, Nicole; Barbosa Solomieu, Valérie; Moreau, Kevin.
Virus-induced genes were identified using suppression subtractive hybridisation (SSH) from Pacific cupped oyster, Crassostrea gigas, haemocytes challenged by OsHV-1. A total of 304 clones from SSH forward library were sequenced. Among these sequences, some homologues corresponded to (i) immune related genes (macrophage express protein, IK cytokine, interferon-induced protein 44 or multicopper oxidase), (ii) apoptosis related genes (Bcl-2) and (iii) cell signalling and virus receptor genes (glypican). Molecular characterization and phylogenic analysis of 3 immune-related genes (macrophage expressed protein, multicopper oxidase and immunoglobulin domain cell adhesion molecule) were performed. Finally, quantitative PCR revealed significant changes in the...
Tipo: Text
Palavras-chave: Pacific cupped oyster; Crassostrea gigas; OsHV-1; Immunity; Gene expression; Multicopper oxidase; Macrophage expressed protein; Ig cell adhesion molecule; Interferon-induced protein 44; Virus RNA.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00043/15466/12843.pdf

Influence de l'environnement trophique de l'élevage en biofloc sur les performances physiologiques de la crevette Litopenaeus stylirostris : Étude de paramètres de la nutrition, de l'immunité et de la reproduction
Provedor de dados: 5
Autores: Cardona, Emilie.
Biofloc is an intensive rearing system with zero or minimal water exchange where a diverse population of microorganisms (microalgae, zooplankton and bacteria) develops in association with organic matter to form the floc particles. These particles play the double role of biological filter and dietary supplement. This dissertation aims to better understand the process of this rearing system and its interactions with the Litopenaeus stylirostris shrimp. Two specific objectives were integrated within the framework of this general objective: (i) to measure the production gain from biofloc rearing and (ii) to study the interaction between biofloc environment and shrimp and to assess its role on production performances of shrimps. Thus, our results show...
Tipo: Text
Palavras-chave: Biofloc; Crevette; Nutrition; Stress oxydant; Défenses antioxydantes; Immunité; Reproduction; Oeufs; Larves; Bactéries; Microbiote; Biofloc; Shrimp; Nutrition; Oxidative stress; Antioxidant defences; Immunity; Reproduction; Eggs; Larvae; Bacteria; Microbiota.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00272/38294/36492.pdf

Effects of an environmentally relevant concentration of diuron on oyster genitors during gametogenesis: responses of early molecular and cellular markers and physiological impacts
Provedor de dados: 5
Autores: Akcha, Farida; Barranger, Audrey; Bachere, Evelyne; Berthelin, C. Heude; Piquemal, D.; Alonso, P.; Sallan, R. Rondon; Dimastrogiovanni, G.; Porte, C.; Menard, Dominique; Szczybelski, A.; Benabdelmouna, Abdellah; Auffret, M.; Rouxel, Julien; Burgeot, Thierry.
Genitors of the Pacific oyster Crassostrea gigas were submitted during gametogenesis to a short pulse exposure to the herbicide diuron at a realistic environmental concentration. Histological analysis showed no effect of diuron on gametogenesis course, sex ratio and reproductive effort. A non-significant increase in testosterone and progesterone levels was observed in genitors exposed to the herbicide. At cell level, diuron exposure was shown to modulate the phagocytic activity of circulating hemocytes. The results of a transcriptional analysis showed that diuron affected the expression of genes belonging to functions known to play a major role during oyster gametogenesis such as gene transcription regulation, DNA replication and repair, DNA methylation...
Tipo: Text
Palavras-chave: Oyster; Pesticide; Reproduction; Histology; Gene expression; RT-qPCR; Steroid; Immunity.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00309/41983/83232.pdf

Modulation des paramètres hémocytaires par la nutrition de l'huitre creuse Crassostrea gigas. Implication dans les mortalités estivales
Provedor de dados: 5
Autores: Delaporte, Maryse.
In the context of Pacific oyster C. gigas summer mortality, the present study demonstrated that the reproductive effort reduced not only the energetic parameters (carbohydrates and CEA) but also the immune parameters (concentration, phagocytosis and adhesive capacity of hemocytes). Increasing food supply from 4% to 12% (of oyster dry weight) did not counteract this phenomena as most of the additional energy was dedicated to the gametogenesis processes. However, after the gametogenesis, the 12% diet clearly favored energy storage restoration and hemocyte production. Hemocyte parameters were also modulated by the food quality. Indeed, hemocyte concentration tended to increase 20:5n-3 and/or 20:4n-6 were supplied by micro-algae or artificial diets. When these...
Tipo: Text
Palavras-chave: Summer mortalities; Flow cytometer; Immunity; Oxidative burst; Phagocytosis; Biochemical composition hemocyte parameters; Essential fatty acids; Nutrition; Crassostrea gigas; Mortalités estivales; Cytomètre de flux; Immunité; Poussée respiratoire; Phagocytose; Réponses hémocytaires; Composition biochimique; Acides gras essentiels; Nutrition; Crassostrea gigas.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/these-357.pdf

Effects de le temperature et du regime alimentaire sur certains parametres de l'immunite cellulaire du loup de mer en elevage
Provedor de dados: 5
Autores: Deschaux, P; Peres, G.
The data showed that antibody response and NK cells activity of a teleostean fish Dicentrarchus labrax (Loup de mer) were maximal when animals were bred at a temperature equal to 18 degree C. A proteinoprive diet enhanced T cytotoxic response and diminished NK cell activity. A fast of 15 days had no effect on these two cellular responses.
Tipo: Text
Palavras-chave: Dicentrarchus labrax; Serranidae; Pisces; Antibodies; Starvation; Toxicity; Cells; Immunity; Diets; Nutrition; Temperature effects; Fish culture.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1248.pdf

Review and perspectives of physiological mechanisms underlying genetically-based resistance of the Pacific oyster Crassostrea gigas to summer mortality
Provedor de dados: 5
Autores: Samain, Jean-francois.
French oyster farming has been subject to severe mortalities during the summer months. Results from the research program "Morest", which ran from 2000 to 2006 and examined the possible causes of these mortalities, led to the construction of a model to explain the interaction between environmental factors, oyster physiology and different opportunistic pathogens underlying oyster summer mortality. Temperature, food, reproduction and stress were the main factors required for oyster mortality. Genetically-based resistance ("R" oysters) or susceptibility ("S" oysters) to summer mortality was revealed by divergent selection. Building on these results, a literature search was made in 2007 on the molecular origin of genetic resistance to such a complex mortality...
Tipo: Text
Palavras-chave: Immunity; Antibacterial activity; Host defence; Environmental stress; Crassostrea gigas.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00051/16229/13752.pdf

Advances in gastropod immunity from the study of the interaction between the snail Biomphalaria glabrata and its parasites: A review of research progress over the last decade
Provedor de dados: 5
Autores: Coustau, C.; Gourbal, B.; Duval, D.; Yoshino, T. P.; Adema, C. M.; Mitta, Guillaume.
This review summarizes the research progress made over the past decade in the field of gastropod immunity resulting from investigations of the interaction between the snail Biomphalaria glabrata and its trematode parasites. A combination of integrated approaches, including cellular, genetic and comparative molecular and proteomic approaches have revealed novel molecular components involved in mediating Biomphalaria immune responses that provide insights into the nature of host-parasite compatibility and the mechanisms involved in parasite recognition and killing. The current overview emphasizes that the interaction between B. glabrata and its trematode parasites involves a complex molecular crosstalk between numerous antigens, immune receptors, effectors...
Tipo: Text
Palavras-chave: Biomphalaria glabrata; Schistosoma mansoni; Echinostoma caproni; Immunity; Compatibility.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00276/38718/38622.pdf

Interaction de la bactérie Vibrio harveyi avec son hôte, l'hormeau Haliotis tuberculata : approches physiologiques, cellulaires et moléculaires
Provedor de dados: 5
Autores: Travers, Marie-agnes.
Abalone aquaculture only recently developed in western Europe, but already it has to face numerous pathologies. Since 1998, the natural and farm stocks of Haliotis tuberculata suffer regularly high mortalities, mainly due to the pathogenic bacterium, Vibrio harveyi. The vibriosis of the European abalone, in particular its macroscopic signs, and the conditions necessary for its development have been studied in detail by field and laboratory experiments. We have been able to show the importance of the interplay between water temperature (&gt;17°C), animal physiology (reproduction period) and a pathogenic strain (harbouring the plasmid pVCR1) for the development of this abalone disease. A limited localisation study of the abalone target tissues (gills, muscle...
Tipo: Text
Palavras-chave: Ormeau; Haliotis tuberculata; Bactéries; Vibrio harveyi; Vibriose; Température; Immunité; Reproduction; Hémocytes; MAP Kinases; Plasmide; Virulence; GFP; Abalone; Haliotis tuberculata; Bacteria; Vibrio harveyi; Vibriosis; Temperature; Immunity; Reproduction; Haemocytes; MAP Kinases; Plasmid; Virulence; GFP.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00176/28729/27196.pdf

Immune responses of phenoloxidase and superoxide dismutase in the manila clam Venerupis philippinarum challenged with Vibrio tapetis – Part I: Spatio-temporal evolution of enzymes’ activities post-infection
Provedor de dados: 5
Autores: Le Bris, Cedric; Richard, Gaelle; Paillard, Christine; Lambert, Christophe; Seguineau, Catherine; Gauthier, Olivier; Pernet, Fabrice; Guerard, Fabienne.
Manila clams, Venerupis philippinarum (Adams and Reeve, 1850), were experimentally challenged with two Vibrio tapetis strains: CECT4600T, the causative agent of Brown Ring Disease (BRD); and LP2 supposedly non-pathogenic in V. philippinarum. Changes in phenoloxidase (PO) and superoxide dismutase (SOD), two major enzymes involved in immunity, were studied in two tissues, the mantle and hemolymph for 30 days after infection in the extrapallial cavity. Bacterial infection in V. philippinarum resulted in modulation of PO and SOD activities that was both tissue- and time-dependent. A response at early times was detected in the mantle and was associated with significant increases in PO and SOD activities in LP2- and CECT4600T-challenged clams 36h post injection....
Tipo: Text
Palavras-chave: Venerupis philippinarum; Vibrio tapetis; Immunity; Phenoloxidase; Superoxide dismutase.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00221/33257/31733.pdf

Demonstration of a true phenoloxidase activity and activation of a ProPO cascade in Pacific oyster, Crassostrea gigas (Thunberg) in vitro
Provedor de dados: 5
Autores: Hellio, Claire; Bado Nilles, Anne; Gagnaire, Beatrice; Renault, Tristan; Thomas-guyon, Helene.
The prophenoloxidase (ProPO) system is the origin of melanin production and is considered to be an innate defence mechanism in invertebrates. In different bivalve species, phenoloxidase (PO) is present in the haemolymph as an inactive form of ProPO. The present study focuses on the Pacific adult oyster, Crassostrea gigas, an economically important bivalve species along French coasts. The results indicate that many factors may inhibit the PO-like activity. These include: phenylthiourea (PTU), sodium diethylthiocarbamate (DETC), beta-mercaptoethanol and tropolone, which repressed the spontaneous PO activity. The activation of PO-like activity in C. gigas acellular fraction by lipopolysaccharide (LPS) involved participation of other factors, including at...
Tipo: Text
Palavras-chave: Prophenoloxidase; Phenoloxidase; Oyster; Immunity; Defence; Crassostrea gigas.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2926.pdf

Effect of dietary water content on European sea bass (Dicentrarchus labrax) growth and disease resistance
Provedor de dados: 5
Autores: Przybyla, Cyrille; Fievet, Julie; Callier, Myriam; Blancheton, Jean-paul.
The effect of dietary water content on Dicentrarchus labrax growth parameters and resistance to Vibrio anguillarum infection was investigated using commercial pellets with identical energy contents and different moisture levels. The first experiment hypothesis was that moisturizing pelleted ration can have an impact on Dicentrarchus labrax growth performance by the osmoregulation energy cost reduction. In a second time, the experiment explores the effect of water addition in pellets on the fish resistance to a disease. A specific device was built to uniformly moisturize dry pellets to different moisture levels, i.e. 8%, 20%, 40% and 60%. After an acclimation period and a 54-day rearing period, the control fish had grown from 72.7 +/- 17.9 g to 133.3 +/-...
Tipo: Text
Palavras-chave: Fish aquaculture; Dietary moisture content; Feed pellets; Fish growth; Immunity; Dicentrarchus labrax; Vibrio anguillarum.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00248/35927/34446.pdf

In vivo effects of metaldehyde on Pacific oyster, Crassostrea gigas: comparing hemocyte parameters in two oyster families.
Provedor de dados: 5
Autores: Moreau, Pierrick; Burgeot, Thierry; Renault, Tristan.
Pollutants via run-off into the ocean represent a potential threat to marine organisms, especially bivalves such as oysters living in coastal environments. These organisms filter large volumes of seawater and may accumulate contaminants within their tissues. Pesticide contamination in water could have a direct or indirect toxic action on tissues or cells and could induce alteration of immune system. Bivalve immunity is mainly supported by hemocytes and participates directly by phagocytosis to eliminate pathogens. Some studies have shown that pesticides can reduce immune defences and/or modify genomes in vertebrates and invertebrates. Metaldehyde is used to kill slugs, snails and other terrestrial gastropods. Although metaldehyde has been detected in...
Tipo: Text
Palavras-chave: Immunity; Hemocytes; Metaldehyde; Pacific oyster; Flow cytometry; In vivo; Genetic diversity.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00195/30602/29059.pdf

Étude des interactions entre infection à ostreid herpesvirus 1, immunité, autophagie et pesticides chez l’Huître creuse, Crassostrea gigas
Provedor de dados: 5
Autores: Moreau, Pierrick.
The thesis work is part of the very current issue on mass mortality outbreaks affecting Pacific oyster, C. gigas, spat and juveniles and questions about the involvement of pesticides in this phenomenon. The first part of this thesis was devoted to study the effects of pesticides on hemocyte parameters in the Pacific oyster (in vitro and in vivo). The immunomodulator effect of selected pesticides (alone or in mixture) has been explored principally through flow cytometry. The second part concerned the study of the effects of a pesticides mixture on OsHV-1 itself. No direct effects have been reported on the viral particles in presence of the pollutants. Moreover, pesticide effects on Pacific oysters were also explored through experimental pathology assays...
Tipo: Text
Palavras-chave: Pacific oyster; Pesticides; OsHV-1; Autophagy; Immunity; Hemocyte; Pathology.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00226/33740/32149.pdf

Immune priming and portal of entry effectors improve response to vibrio infection in a resistant population of the European abalone
Provedor de dados: 5
Autores: Dubief, Bruno; Nunes, Flavia; Basuyaux, Olivier; Paillard, Christine.
Since 1997, populations of the European abalone Haliotis tuberculata suffer mass mortalities attributed to the bacterium Vibrio harveyi. These mortalities occur at the spawning season, when the abalone immune system is depressed, and when temperatures exceed 17 °C, leading to favorable conditions for V. harveyi proliferation. In order to identify mechanisms of disease resistance, experimental successive infections were carried out on two geographically distinct populations: one that has suffered recurrent mortalities (Saint-Malo) and one that has not been impacted by the disease (Molène). Furthermore, abalone surviving these two successive bacterial challenges and uninfected abalone were used for several post-infection analyses. The Saint-Malo population...
Tipo: Text
Palavras-chave: Immunity; Hemocyte; Abalone; Disease; Extracellular products; Immune priming; Vibrio harveyi; Flow cytometry; Resistance; Phagocytosis; Bacterial growth; QPCR; Gill.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00357/46800/46667.pdf

Microarray analysis highlights immune response of Pacific oysters as a determinant of resistance to summer mortality
Provedor de dados: 5
Autores: Fleury, Elodie; Huvet, Arnaud.
Summer mortality of Crassostrea gigas is the result of a complex interaction between oysters, their environment, and pathogens. A high heritability was estimated for resistance to summer mortality, which provided an opportunity to develop lines of oysters that were resistant (R) or susceptible (S) to summer mortality. Previous genome-wide expression profiling study of R and S oyster gonads highlighted reproduction and antioxidant defense as constitutive pathways that operate differentially between these two lines. Here, we show that signaling in innate immunity also operates differentially between these lines, and we hypothesize that this is at the main determinant of their difference in survival in the field. A reanalysis of our published microarray data...
Tipo: Text
Palavras-chave: Mollusca; Crassostrea gigas; Gene; Immunity; CDNA microarray; Summer mortality.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00083/19423/17213.pdf

A New Assessment of Thioester-Containing Proteins Diversity of the Freshwater Snail Biomphalaria glabrata
Provedor de dados: 5
Autores: Duval, David; Pichon, Rémi; Lassalle, Damien; Laffitte, Maud; Gourbal, Benjamain; Galinier, Richard.
Thioester-containing proteins (TEPs) superfamily is known to play important innate immune functions in a wide range of animal phyla. TEPs are involved in recognition, and in the direct or mediated killing of several invading organisms or pathogens. While several TEPs have been identified in many invertebrates, only one TEP (named BgTEP) has been previously characterized in the freshwater snail, Biomphalaria glabrata. As the presence of a single member of that family is particularly intriguing, transcriptomic data and the recently published genome were used to explore the presence of other BgTEP related genes in B. glabrata. Ten other TEP members have been reported and classified into different subfamilies: Three complement-like factors (BgC3-1 to BgC3-3),...
Tipo: Text
Palavras-chave: Biomphalaria glabrata; Thioester-containing protein; Alternative splicing; Immunity; Schistosome.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00601/71268/69657.pdf

Expression of candidate genes related to metabolism, immunity and cellular stress during massive mortality in the American oyster Crassostrea virginica larvae in relation to biochemical and physiological parameters
Provedor de dados: 5
Autores: Genard, Bertrand; Moraga, Dario; Pernet, Fabrice; David, Elise; Boudry, Pierre; Tremblay, Rejean.
Quantification of mRNA of genes related to metabolism, immunity and cellular stress was examined in relation to a massive mortality event during the culture of American oyster larvae, Crassostrea virginica which was probably, in regard to previous microbiological analysis, induced by vibrio infection. To document molecular changes associated with the mortality event, mRNA levels were compared to biochemical and physiological data, previously described in a companion paper. Among the 18 genes studied, comparatively to the antibiotic control, 10 showed a lower relative gene expression when the massive mortality occurred. Six of them are presumed to be related to metabolism, corroborating the metabolic depression associated with the mortality event suggested...
Tipo: Text
Palavras-chave: Massive mortality; Relative gene expression; Metabolism; Immunity; Cellular stress; Larvae.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00075/18585/16138.pdf

Antiviral immunity in the Pacific oyster, Crassostrea gigas: last development and perspective
Provedor de dados: 5
Autores: Renault, Tristan; Faury, Nicole; Barbosa, Valerie; Moreau, Kevin; Haffner, Philippe; Pepin, Jean-francois.
Herpes-like viruses have been reported last decades in various marine mollusc species in association with mortality outbreaks throughout the world (Renault &amp; Novoa 2004). One of these viruses isolated during French outbreaks has been characterised as an unassigned member of the Herpesviridae family and named ostreid herpes virus 1 (OsHV-1) or Pacific oyster herpes virus (Davison et al. 2005). Studying anti-viral non-specific defence mechanisms (innate immunity) is of great interest, because they constitute the only one in molluscs. Therefore, innate immunity has be investigated in the Pacific cupped oyster, Crassostrea gigas. The main aim of the work was focused on the identification and the characterisation of genes induced by OsHV-1 in the Pacific...
Tipo: Text
Palavras-chave: Pathoogy; Protein gene; Immunity; Herpesviridae; OsHV 1; Crassostrea gigas; Pacific oyster.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/acte-4035.pdf

Contribution à l'étude de l'ontogenèse du système immunitaire chez l'huître creuse Crassostrea gigas
Provedor de dados: 5
Autores: Tirape Bajana, Ana.
The interest for the understanding of the immune mechanisms in the oyster, Crassotrea gigas has been considerably increased these last years, mainly because of economie losses due to diseases which affected the continuity of this species. The studies of these mechanisms contributes to a better understanding of the differential susceptibilities observed in this species against various pathogens. In the present study, our  goal was to define the ontogenesis of immune system in C. gigas during the development, by functional genomic approaches. The studies have been focalized on the analyses of expression and localization of effectors previously identified in adult oysters as implicated in immunity. We have shown, in particular, that hemocytes appear in the...
Tipo: Text
Palavras-chave: Invertébré; Mollusque bivalve; Huître; Cra; Immunité; Hémocytes; Hématopoïèse; Développement; Ontogenèse; Expression des gènes; Q-PCR; SSH; Invertebrate; Bivalve Mollusk; Oyster; Crassostrea gigas; Immunity; Hemocytes; Hematopoiesis; Development; Ontogenesis; Gene expression; Q-PCR; SSH.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00440/55113/56565.pdf

First evidence of a potential antibacterial activity involving a laccase-type enzyme of the phenoloxidase system in Pacific oyster Crassostrea gigas haemocytes
Provedor de dados: 5
Autores: Luna-acosta, Andrea; Saulnier, Denis; Pommier, Mylene; Haffner, Philippe; De Decker, Sophie; Renault, Tristan; Thomas-guyon, Helene.
Phenoloxidases (POs) are a group of copper proteins including tyrosinase, catecholase and laccase. In several insects and crustaceans, antibacterial substances are produced through the PO cascade, participating in the direct killing of invading microorganisms. However, although POs are widely recognised as an integral part of the invertebrate immune defence system, experimental evidence is lacking that these properties are conserved in molluscs, and more particularly in the Pacific oyster Crassostrea gigas. In the present study, Vibrio splendidus LGP32 and Vibrio aestuarianus 02/041 growths were affected, after being treated with C. gigas haemocyte lysate supernatant (HLS), and either a common substrate of POs, l-3,4-dihydroxyphenylalanine (l-DOPA), to...
Tipo: Text
Palavras-chave: Phenoloxidases; Antibacterial activity; Vibrio; Bivalve; Immunity.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00045/15598/13001.pdf

Metabolic responses of clam Ruditapes philippinarum exposed to its pathogen Vibrio tapetis in relation to diet
Provedor de dados: 5
Autores: Richard, Gaelle; Guerard, Fabienne; Corporeau, Charlotte; Lambert, Christophe; Paillard, Christine; Pernet, Fabrice.
We investigated the effect of brown ring disease (BRD)1 development and algal diet on energy reserves and activity of enzymes related to energy metabolism, antioxidant system and immunity in Manila clam, Ruditapes philippinarum. We found that algal diet did not impact the metabolic response of clams exposed to Vibrio tapetis. At two days post-injection (dpi), activities of superoxide dismutase and glutathione peroxidase (GPx) decreased whereas activities of nitric oxide synthase (iNOS) and catalase increased in infected clams, although no clinical signs were visible (BRD-). At 7 dpi, activities of several antioxidant and immune-related enzymes were markedly increased in BRD-likely indicating an efficient reactive oxygen species (ROS) scavenging compared to...
Tipo: Text
Palavras-chave: Antioxidant enzymes; Immunity; Energetic metabolism; Ruditapes philippinarum; Vibrio tapetis.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00316/42684/42057.pdf

Ecologie du système hôte - parasite, juvéniles G0 de sole (Solea solea) - métacercaires de Digènes : dynamique et effets de l'infestation
Provedor de dados: 5
Autores: Durieux, Eric.
Coastal areas, such as shallow water bays and estuaries, serve as nurseries for juveniles of many marine fishes and especially flatfishes. Parasites play an important role in these marine ecosystems, but it remains poorly studied. Little attention has been paid to parasitism as a potential factor of variation in flatfish juveniles biological performances in these habitats. Sole juveniles, Solea solea (Pleuronectiformes, Soleidae), that is a species of primary importance for fisheries, are infected by digenean metacercariae. Thus, the aims of this PhD thesis were: i) to determine the spatio-temporal dynamics of the digenean metacercariae infection of 0-group sole juveniles at different scales; ii) to estimate the effects of this infection at different...
Tipo: Text
Palavras-chave: North East Atlantic; Mussel farming; Biological tags; Behaviour; Condition indices; Growth; Immunity; Parasitism; Flatfish; Nurseries; Atlantique Nord Est; Mytiliculture; Marqueurs biologiques; Comportement; Indices de condition; Croissance; Immunité; Parasitisme; Pleuronectiformes; Nourriceries.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/these-2933.pdf

Pacific oyster (Crassostrea gigas) hemocyte are not affected by a mixture of pesticides in short-term in vitro assays
Provedor de dados: 5
Autores: Moreau, Pierrick; Burgeot, Thierry; Renault, Tristan.
Pesticides are frequently detected in estuaries among the pollutants found in estuarine and coastal areas and may have major ecological consequences. They could endanger organism growth, reproduction or survival. In the context of high mortality outbreaks affecting Pacific oysters, Crassostrea gigas, in France since 2008, it appears of importance to determine the putative effects of pesticides on oyster susceptibility to infectious agents. Massive mortality outbreaks reported in this species, mainly in spring and summer, may suggest an important role played by the seasonal use of pesticides and freshwater input in estuarine areas where oyster farms are frequently located. To understand the impact of some pesticides detected in French waters, their effects...
Tipo: Text
Palavras-chave: Immunity; Hemocytes; Pesticides; Pacific oyster; Crassostrea gigas; Flow cytometry; Bivalve.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00144/25555/23700.pdf

Impact of malnutrition on immunity and infection
Provedor de dados: 80
Autores: França,TGD; Ishikawa,LLW; Zorzella-Pezavento,SFG; Chiuso-Minicucci,F; da Cunha,MLRS; Sartori,A.
Malnutrition may be a consequence of energy deficit or micronutrient deficiency. It is considered the most relevant risk factor for illness and death, particularly in developing countries. In this review we described the magnitude of this problem, as well as its direct effect on the immune system and how it results in higher susceptibility to infections. A special emphasis was given to experimental models used to investigate the relationship between undernutrition and immunity. Malnutrition is obviously a challenge that must be addressed to health authorities and the scientific community.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Malnutrition; Infection; Immunity; Experimental models.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992009000300003

Interaction between infection, nutrition and immunity in tropical medicine
Provedor de dados: 80
Autores: Pereira,P. C. M.
Host nutritional state has an important role in susceptibility to bacteria, parasites, and viral infections. Infection precipitates the appearance of signs and symptoms of nutrition deficiencies in the undernourished; this can aggravate infection evolution. Infection stimulates specific and non-specific host defense mechanisms; these are directly influenced by the nutritional state of micro- and macronutrients. Immune alterations, which are closely related to nutritional status, markedly contribute to a higher susceptibility to infectious agents and can also contribute to worsening nutritional state, forming a vicious cycle.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Infection; Nutrition; Immunity; Tropical diseases.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992003000200003

Heterogeneity among Strains of Eimeria tenella Isolated from Bangladesh
Provedor de dados: 19
Autores: Karim, M. J.; Begum, N.; Khan, M. S. R.
Palavras-chave: Eimeria; Strains; Heterogeneity; Immunity; Precocious.
Ano: 1994
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/205

Bovine embryo induces an anti-inflammatory response in uterine epithelial cells and immune cells in vitro: Possible involvement of interferon tau as an intermediator
Provedor de dados: 19
Autores: Talukder, Anup K.; Yousef, Mohamed S.; Rashid, Mohammad B.; Awai, Kensuke; Acosta, Tomas J.; Shimizu, Takashi; Okuda, Kiyoshi; Shimada, Masayuki; Imakawa, Kazuhiko; Miyamoto, Akio.
Recent observations suggest that the bovine uterus starts to react to the early embryo immediately after its arrival from the oviduct. The present study aimed to investigate the effect of the early developing embryo on the immune-related gene profile in bovine uterine epithelial cells (BUECs) in vitro, and to further examine the impact of conditioned media (CM), either from embryo-BUEC co-culture or embryo culture alone, on gene expression in peripheral blood mononuclear cells (PBMCs). First, BUECs were co-cultured with morulae (n = 10) for D5-D9 (D0 = IVF), and gene expression in BUECs was analyzed. Subsequently, PBMCs were cultured in CM from embryo-BUEC co-culture or D5-D9 embryo culture, and gene expression was evaluated. In BUECs, the embryo induced...
Palavras-chave: Bovine; Embryo; Immunity; Interferon tau (IFNT); Uterus.
Ano: 2017
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4532

Determinación de moléculas que intervienen en el sistema inmune del camarón blanco (Penaeus vannamei) en respuesta al uso de inmunoestimulantes.
Provedor de dados: 20
Autores: Campa, A.I.
La acuacultura de crustáceos penaeidos constituye una actividad económicamente importante que genera elevados ingresos si se garantiza una producción óptima del mismo. Esta actividad está limitada en diferentes partes del mundo por enfermedades infecciosas provocadas entre otros, por bacterias, virus, hongos, parásitos y por el uso regular de antibióticos que han dirigido progresivamente a las poblaciones de cultivo a una situación crítica de resistencia. El estudio del sistema inmune en crustáceos comienza a ser una herramienta muy útil para el diseño de estrategias que permitan determinar y mejorar la respuesta del sistema de defensa del hospedero hacia los patógenos potenciales. Para ello, es requerido que las investigaciones básicas estén dirigidas a...
Tipo: Theses and Dissertations
Palavras-chave: 832; Crustacean culture; Infectious diseases; Immunity; Crustacean culture; Infectious diseases; Immunity; Http://aims.fao.org/aos/agrovoc/c_1985; Http://aims.fao.org/aos/agrovoc/c_34024; Http://aims.fao.org/aos/agrovoc/c_3802.
Ano: 2002
URL: http://hdl.handle.net/1834/3413

Susceptibility of Atta sexdens worker ants treated with the immunosuppressant Sandimmun Neoral to Metarhizium anisopliae
Provedor de dados: 86
Autores: Dornelas,Aline Silvestre Pereira; Sarmento,Renato de Almeida; Pedro-Neto,Marçal; Silva,Daniella Gonçalves da; Santos,Gil Rodrigues dos; Nascimento,Mariela Otoni do; Oliveira,Cléia Almeida; Souza,Danival José de.
Abstract: The objective of this work was to evaluate if the immunosuppressant Sandimmun Neoral enhances the activity of Metarhizium anisopliae against the leaf-cutting ant Atta sexdens. The vulnerability to the pathogen was measured by comparing the mortality rate of worker ants subjected to the following treatments: immunosuppressant+control, immunosuppressant+M. anisopliae, excipient+control, excipient+M. anisopliae, control+M. anisopliae, and control. Worker ants treated with immunosuppressant+M. anisopliae showed the highest mortality rate in comparison with those subjected to all other treatments. The use of the immunosuppressant together with entomopathogenic fungus controlled leaf-cutting ants in laboratory conditions.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological control; Formicidae; Immunity; Immunosuppression.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000200133

The effects of a combination of garlic, oyster mushroom and propolis extract in comparison to antibiotic on growth performance, some blood parameters and nutrients digestibility of male broilers
Provedor de dados: 89
Autores: Daneshmand,A; Sadeghi,GH; Karimi,A.
A study was conducted to evaluate the combined effects of garlic, oyster mushroom and propolis extract on the growth performance, organ weights, antibody response to Newcastle Disease Virus (NDV), serum lipid concentrations and nutrient digestibility of male broilers. A total of 192 day old chicks (Ross 308) were randomly assigned to 3 treatments with 4 replications (16 birds per replication). Experimental treatments were a maize- soybean based diet as control, control diet supplemented with a combination of garlic (30 g/kg), oyster mushroom (2 g/kg) and propolis extract (0.2 g/kg) known as GMP, and control diet supplemented with Virginamycin (0.25 g/kg) as antibiotic. The inclusion of GMP decreased (p &lt; 0.05) live body weight, average daily gain and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Garlic; Mushroom; Propolis; Performance; Immunity; Broiler.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000200009

Effects of prebiotics and probiotics on the colonization and immune response of broiler chickens challenged with Salmonella Enteritidis
Provedor de dados: 89
Autores: Ribeiro,AML; Vogt,LK; Canal,CW; Cardoso,MRI; Labres,RV; Streck,AF; Bessa,MC.
The present study aimed at evaluating the effect of the prebiotic Bio Mos™ (2 kg/ton up to 10 days; 1 kg/ton from 10 to 21 days; and 0.5 kg/ton from 21 days to slaughter), of the probiotic Lac XCL 5x™ (by spray-mixing), of a combination of the two supplements (prebiotic + probiotic), and of one growth promoter antimicrobial agent (Avilamycin at 15 ppm). Birds were orally challenged with inoculated Salmonella Enteritidis (SE) 10(6) CFU at 3 days of age. Four hundred and eighty male Ross chicks were used. The experiment lasted 28 days, and the analyses were conducted at 15 and 28 days of age. Cecum and liver bacterial colonization of production of anti-SE antibiodies, intestinal micrometry and bird performance were assessed. Neither the prebiotic, nor the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Additives; Birds; Immunity; Salmonellosis.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000300009

Avian cytokines in health and disease
Provedor de dados: 89
Autores: Wigley,P; Kaiser,P.
Cytokines are proteins secreted by cells that play an important role in the activation and regulation of other cells and tissues during inflammation and immune responses. Although well described in several mammalian species, the role of cytokines and other related proteins is poorly understood in avian species. Recent advances in avian genetics and immunology have begun to allow the exploration of cytokines in health and disease. Cytokines may be classified in a number of ways, but may be conveniently arranged into four broad groups on the basis of their function. Proinflammatory cytokines such as interleukin-6 and interleukin-1beta play a role in mediating inflammation during disease or injury. Th1 cytokines, including interleukin-12 and interferon-gamma,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cytokines; Immunity; Infectious disease; Inflammation; Vaccination.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2003000100001

Effects of Phytogenic Additives and Organic Acids, alone or in combination, on the Performance, Intestinal Quality and Immune Responses of Broiler Chickens
Provedor de dados: 89
Autores: Fascina,VB; Pasquali,GAM; Carvalho,FB; Muro,EM; Vercese,F; Aoyagi,MM; Pezzato,AC; Gonzales,E; Sartori,JR.
ABSTRACT The present study was conducted to evaluate the effects of phytogenic additives (PA) and organic acids (OA), alone or in combination, on the performance, intestinal histomorphometry and lipid oxidation, and immune responses of broiler chickens. In this experiment, 820 one-day-old chicks were distributed according to a completely randomized design in a 2 × 2 + 1 factorial arrangement, with four replicates of 41 broilers each. The dietary treatments consisted of a control diet with no PA or OA (CD); CD with OA and no PA (CD+OA-PA); CD with PA and no OA (CD+PA-CD); CDwith both PA and OA (CD+PA+CD); and CD + avilamycin + monesin sodium. Broiler performance was not affected by the alternative feed additives, except from 1 to 21 days, when broilers fed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acidifier; Essential oil; Immunity; Intestinal histology; Plant extract.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000300497

Infectious Bursal Disease: Pathogenicity and Immunogenicity of Vaccines
Provedor de dados: 89
Autores: Camilotti,E; Moraes,LB; Furian,TQ; Borges,KA; Moraes,HLS; Salle,CTP.
ABSTRACT The Infectious Bursal Disease (IBD) is a contagious viral disease that affects young chickens and may cause high morbidity and mortality. As the virus is very resistant to the environment, vaccination is required in case of high infection pressure. Due to variations in the virulence degree of the vaccines available to control IBD, this study aimed at evaluating the pathogenicity and immunogenicity of three types of vaccines. In total, 220 one-day-old specific pathogen free (SPF) chickens were immunized with recombinant, immune-complex and intermediate vaccines, or not vaccinated (55 birds per group) and challenged with IBD G11 strain on day 25. On days 25, 30, and 35, the Bursa of Fabricius (BF) were submitted to gross and histological...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Infectious Bursal Disease; Chickens; Vaccine; Immunity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000200303

Comparative Effect of Zinc Concentration and Sources on Growth Performance, Accumulation in Tissues, Tibia Status, Mineral Excretion and Immunity of Broiler Chickens
Provedor de dados: 89
Autores: Azad,SK; Shariatmadari,F; Torshizi,MAK; Chiba,LI.
ABSTRACT This experiment was conducted to investigate the effect of feeding different concentrations and sources of zinc (Zn) on the growth performance, tissue mineral status, bone morphology and immunity responses in 0-4-week broiler chickens. Four hundred and forty 1-d-old broiler chickens were assigned randomly to 11 dietary treatments with 4 cages per treatment and 10 broiler chickens per cage in a completely randomized design. Dietary treatments were: corn-soybean meal basal diet (negative control), basal diet supplemented with 5 g yeast/kg (yeast), and basal diet supplemented with 20, 50, or 80 mg of added Zn/kg as ZnSO4, Zn-Met, or Zn-yeast in a 3 x 3 factorial arrangement of treatments. The results showed that broilers fed Zn supplemented diets had...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler chickens; Growth performance; Bone characteristic; Immunity; Zinc.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000200322

Effects of methionine source, arginine: lysine ratio and sodium chloride level in the diets of grower broilers reared under high-temperature conditions
Provedor de dados: 89
Autores: Montanhini Neto,R; Ceccantini,ML; Fernandes,JIM.
The objective of this study was to evaluate the influence of methionine sources (DL-methionine 99% powder (DLM) or methionine hydroxy analog liquid 88% (HMTBA)), arginine:lysine (Arg:Lys) ratio and sodium chloride (NaCl) content in the diet of broilers on their performance, carcass yield, serum biochemistry, duodenal mucosal morphology, and immune response. Birds were kept under high temperature conditions during the grower phase and were inoculated or not with an antigen. The use of HMTBA promoted better live performance and carcass yield than the use of DLM. Diets with 1.05 Arg:Lys ratio resulted in better live performance, higher carcass and breast meat yields, longer villi, shallower crypts, and stronger immune response when broilers were challenged...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: DL-methionine; Methionine hydroxy analog; Intestinal morphology; Immunity.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000200012

Effect of Broccoli Residues Fermented with Probiotics on the Growth Performance and Health Status of Broilers Challenged with Clostridium Perfringens
Provedor de dados: 89
Autores: Liu,N; Deng,X; Liang,C; Cai,H.
ABSTRACT This study aimed at investigating the effects of broccoli residues fermented with probiotics (BF) on the growth performance, immunity, and gut health in broilers challenged with Clostridium perfringens (C. perfringens). A total of 600 broilers (one day old) were randomly allotted into five treatments with six replicates of 20 birds each and were reared until 42 days of age. The treatments included a positive control (PC, fed a basal diet and reared on uncontaminated litter), a negative control (NC, birds reared on litter contaminated with C. perfringens and fed a basal diet), and NC plus BF at 25, 50 or 75 g/kg of diet. The BF contained yeast 3.1 × 107cfu/g, lactic acid bacteria 9.5 × 106cfu/g and Bacillus subtilis 3.5 × 106cfu/g. Birds in the NC...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broilers; Broccoli residues fermented with probiotics; Growth performance; Gut health; Immunity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000400625

Effect of Different Dietary Threonine Levels on Optimal Growth Performance and Intestinal Morphology in 1-14 Days Old Ross 308 Broilers
Provedor de dados: 89
Autores: Najafi,R; Ahmar,R; Tazehkand,GN.
SUMMARY This experiment was carried out to evaluate the effects of four levels of dietary threonine (Thr) supplementations on growth performance, gut size and histomorphometric alterations of small intestines in broiler chicks in 1-14 days. Two hundred eighty-eight Ross 308 one-day-old male broiler chicks were randomly assigned to four treatments with six replicates (12 birds per replication) received a common diet based on corn, wheat and soybean meal that met nutrients requirement of Ross 308. Birds were fed dietary treatments consisting of four levels of standardized digestible (SD) Thr: control diets (Basal diets) containing 0.65% SD Thr, 0.89% SD Thr (nutrients requirement of Ross 308), 0.93% and 0.97% SD Thr. Body weight gain (BWG), feed intake (FI)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino Acid; Chicken; Diet Requirement; Immunity; Nutrition.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000500059

Preventive, Behavioral, Productive, and Tissue Modification using Green Synthesized Selenium Nanoparticles in the Drinking Water of Two Broiler Breeds under Microbial Stress
Provedor de dados: 89
Autores: Ali,AA; Soliman,ES; Hamad,RT; El-Borad,OM; Hassan,RA; Helal,MS.
ABSTRACT A study was conducted to investigate the influence of selenium nanoparticles (SeNPS) and inorganic selenium supplementation in the drinking water on behavior, performance, and immunity of Arbor Acres® and Ross®308 broilers exposed to E. coli O157:H7 1.6 × 108 challenge at the 10th day of age. 180 one-day-old female broilers were divided into six groups, each with 30 chicks. G1 and G4 were supplied with 1 mL SeNPS 100 mg.L-1/L, G2 and G5 were supplied with 1 mL inorganic selenium 100 mg.L-1/L, and G3 and G6 were supplied with non-supplemented water. Where, G1, G2, and G3 were Arbor Acres®, while G4, G5, and G6 were Ross®308 broilers. A total of 1280 samples (160 sera, 160 intestinal swabs and 960 organ samples including liver, spleen, bursa, heart,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Behavior; Broiler; Housing; Immunity; Nano-selenium.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000100326

Effect of breeder age and storage conditions of Japanese quail eggs on hatchability, quail neonate quality, and Bursa of Fabricius characteristics
Provedor de dados: 96
Autores: Araújo,Itallo Conrado Sousa de; Mesquita,Mariana Alves; Café,Marcos Barcellos; Stringhini,José Henrique; Paz,Paulo Henrique Sousa da; Noleto,Raiana Almeida; Leandro,Nadja Susana Mogyca.
ABSTRACT Two experiments were conducted to evaluate combinations of different storage periods and temperature of hatching eggs of breeder quails in two stages of the production cycle (24 and 43 weeks) on hatchability, quail neonate quality, and Bursa of Fabricius characteristics. In each experiment, a total of 1.050 Japanese quail eggs were incubated in a randomized block design in a factorial arrangement of 2 × 5 × 2, with two breeder ages (24 and 43 weeks), five storage periods (one, three, six, nine, and twelve days), and two storage temperatures (28 and 14 °C), totaling 20 treatments with 52 eggs each. Quantitative data were subjected to ANOVA and means were compared by Tukey's test. Qualitative data were subjected to Friedman's test. Polynomial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coturnix coturnix japonica; Fertile egg; Flock age; Immunity; Quail production.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000900731

Advances in poultry nutrition
Provedor de dados: 96
Autores: Kidd,Michael T.
Nutritional advances as discussed in these proceedings embrace historical perspective as well as futuristic perspectives. Indeed, we must have a clear understanding of the past to identify key "advances" that will mold the future of poultry nutrition. Early nutrition research is discussed with reference to in ovo nutrition and nutritional needs up to day seven post-hatch. In addition, the nutrition of the hen is key in early nutrition of chicks. Key advances that have impacted diet formulation are energy and nutrient liberating enzymes, and the use of L-threonine. Key nutritional mechanisms that have been elucidated the past two decades include nutrition in immunity and gut health. Advances in nutritional specifications for specific genetic strains of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Immunity; L-threonine; Gut health; Nutrition "in ovo"; Nutrition up to seven days post hatch; Nutrient liberating enzymes.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009001300020

Fasted and postprandial response of serum physiological response, hepatic antioxidant abilities and HSP70 expression in Wuchang bream (Megalobrama amblycephala) fed different dietary carbohydrate levels
Provedor de dados: 96
Autores: Zhou,Chuanpeng; Ge,Xianping; Liu,Bo; Xie,Jun; Chen,Ruli.
The effect of dietary carbohydrate (CHO) level on serum physiological response, hepatic antioxidant abilities and heat shock protein 70 (HSP70) expression of Wuchang bream (Megalobrama amblycephala) was studied. Two isonitrogenous (28.56% crude protein) and isolipidic (5.28% crude lipid) diets were formulated to contain 30% or 53% wheat starch. Diets were fed for 90 days to fish in triplicate tanks (28 fish per tank). At the end of feeding trial, significantly higher serum triglyceride level, insulin level, cortisol level, and malondialdehyde (MDA) content were observed in fish fed the 53% CHO diet, while significantly lower serum total protein content, alkaline phosphatase activity, superoxide dismutase activity and total antioxidative capacity were found...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biochemical parameters; Gene expression; Herbivorous fish; Immunity; Starch.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014001200627

Passive immune transfer, health, pre-weaning performance, and metabolism of dairy calves fed a colostrum supplement associated with medium-quality maternal colostrum
Provedor de dados: 96
Autores: Paula,Marília Ribeiro De; Rocha,Nathália Brito; Miqueo,Evangelina; Silva,Fernanda Lavínia Moura; Coelho,Marina Gavanski; Bittar,Carla Maris Machado.
ABSTRACT The objective of this study was to evaluate passive immunity transfer, health, performance, and metabolism of Holstein calves fed colostrum supplement associated with medium-quality colostrum. After birth, calves were blocked according to birth weight and date and distributed into the following treatments: high-quality colostrum (&gt; 50 mg of Ig/mL; n = 15; 150 g kg−1 BW; positive control group); medium-quality colostrum (30-40 mg of Ig/mL; n = 14; 150 g kg−1 BW), and medium-quality colostrum (30-40 mg of Ig/mL; n = 15; 150 g kg−1 BW) + colostrum supplement (15 mL) given with the colostrum. Colostrum was given within the first 12 h of life in two meals by nipple bottle, and colostrum replacer was administered by a blister syringe. Blood samples...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Blood parameters; Colostrum supply; Immunity; Immunoglobulin Y; Intake.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100717

การประกอบสูตรอาหารเพื่อสร้างภูมิคุ้มกันในสัตว์
Provedor de dados: 106
Autores: Yauvamall Kajarenl.
Tipo: Collection
Palavras-chave: Nutrition; Immunity; Animal feeding; Stressors; สัตว์เศรษฐกิจ; อาหารสัตว์; โภชนาการสัตว์; ภูมิคุ้มกันโรค; สูตรอาหาร; วัตถุดิบ; ความต้องการอาหารของสัตว์; สารเสริม.
Ano: 2011
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5195

Heat stress and vitamin E in diets for broilers as a mitigating measure
Provedor de dados: 2
Autores: Dalólio, Felipe Santos; Albino, Luiz Fernando Teixeira; Lima, Héder José D`avilla; Silva, Jadir Nogueira da; Moreira, Joerley.
This review aimed to identify the importance of vitamin E dietary supplementation to broilers subjected to heat stress in relation to metabolism, growth performance and quality of animal products and its effects on immune system. Vitamin E is the concentration of tocopherol and tocotrienol, which can be found in natural or synthetic form. This vitamin is essential for the integrity of reproductive, muscular, circulatory, nervous and immune systems of the animals. In order to reduce the harmful effects of high temperatures in poultry production, vitamin E supplementation is a viable alternative for the sector. Some studies indicate its potential antioxidant effect able to modulate inflammatory responses and physiological adjustments to mitigate the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nutrição Animal; Nutrição de não ruminantes; Produção animal antioxidant; Performance; Immunity; Meat quality; Supplementation.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/27456

Importance of CD8 T cell-mediated immune response during intracellular parasitic infections and its implications for the development of effective vaccines
Provedor de dados: 42
Autores: Rodrigues,Mauricio M.; Boscardin,Silvia B.; Vasconcelos,José R.; Hiyane,Meire I.; Salay,Gerson; Soares,Irene S.
Obligatory intracellular parasites such as Plasmodium sp, Trypanosoma cruzi, Toxoplasma gondii and Leishmania sp are responsible for the infection of hundreds of millions of individuals every year. These parasites can deliver antigens to the host cell cytoplasm that are presented through MHC class I molecules to protective CD8 T cells. The in vivo priming conditions of specific CD8 T cells during natural infection are largely unknown and remain as an area that has been poorly explored. The antiparasitic mechanisms mediated by CD8 T cells include both interferon-g-dependent and -independent pathways. The fact that CD8 T cells are potent inhibitors of parasitic development prompted many investigators to explore whether induction of these T cells can be a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CD8; Parasites; Immunity; Vaccine.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652003000400005

Probiotic level effects on growth performance, carcass traits, blood parameters, cecal microbiota, and immune response of broilers
Provedor de dados: 42
Autores: POURAKBARI,MOHAMMADREZA; SEIDAVI,ALIREZA; ASADPOUR,LEILA; MARTÍNEZ,ANDRÉS.
Probiotic effects on growth performance, carcass traits, blood parameters, cecal microbiota, and immune response of broilers were studied. Two hundred one-day-old male chickens were allocated to one of five treatments (four replicates of 10 birds per treatment): control, and the same control diet supplemented with 0.005%, 0.01%, 0.015% and 0.02% probiotics. Probiotics in feed at 0.01% or higher levels of supplementation improved body weight gain (+12%) and feed conversion rate (-5%) compared with the control. There were no effects on carcass traits, but the relative weights of drumsticks and wings showed increasing and decreasing linear responses, respectively, to probiotic supplementation level. Blood plasma glucose and albumin contents linearly increased...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digestion; Immunity; Poultry; Probiotics; Production.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000301011

Welfare indicators for laying Japanese quails caged at different densities
Provedor de dados: 42
Autores: SOARES,DANIELA F.; PIZZOLANTE,CARLA C.; DUARTE,KEILA MARIA R.; MORAES,JOSÉ EVANDRO DE; BUDIÑO,FÁBIO E.L.; SOARES,WEBER V.B.; KAKIMOTO,SÉRGIO K.
Abstract In the way to reduce costs in the poultry production, high densities of birds are adopted in the production systems. Such high densities can lead to an inappropriate environment, compromising the welfare and decreasing the animal performance. In this work we aimed to evaluate the effects of different densities on the productive yield, egg quality and immunological aspects of Japanese quails. It was used 816 Japanese quails, during egg production phase, in a random design, with four treatments (121.43 cm2/bird; 106.25 cm2/bird; 94.44 cm2/bird and 85.00 cm2/bird) with six repetitions each. Results indicate density did not interfere on egg quality and all treatments can be considered excellent, once the Haugh Unit was 88.03. Therefore, higher...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Immunity; IgY; Egg quality; Haugh Unit.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703791

Biological parameters of larvae, nymphs, and engorged females of Amblyomma cajennense (Fabricius, 1787) (Acari: Ixodidae) obtained from artificial and successive infestations on Oryctolagus cuniculus (Linnaeus, 1758) (Lagomorpha: Ochotonidae)
Provedor de dados: 45
Autores: Freitas,C.M.V.; Leite,R.C.; Oliveira,P.R.; Fernández,F.C.
The development of acquired resistance to Amblyomma cajennense ticks was evaluated. A total of 18 rabbits were uniformly distributed into three groups named GL, GN, and GA that were submitted to three consecutive infestations with, respectively, larvae, nymphs, and adults of A. cajennense. After the infestations, the parasitic and reproductive parameters of recovered instars were evaluated. A significant reduction of recovery rates of inoculated ticks was observed only after the third infestation of animals in groups GL and GN (P&lt;0.01). The modal day for drop-off of engorged larvae and nymphs increased along the infestations. The recovered engorged nymphs presented a significant reduction of the mean body weight between the first and the third...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tick; Ixodide; Resistance; Immunity; Infestation.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352009000500011

Profile of IL-2, IL-4, IL-10, IFN- γ , TNF- α and KC-like cytokines in pregnant bitches
Provedor de dados: 45
Autores: Feliciano,M.A.R.; Silva,A.S.L.; Crivelaro,R.M.; Oliveira,M.E.F.; Coutinho,L.N.; Vicente,W.R.R.
The aim of this study was to determine the profile of IL-2, IL-4, IL-10, IFN-γ, and TNF-α cytokines and KC-like cells (natural killer) in pregnant bitches, unpublished values for the species. A total of 27 females of the Shi Tzu, Pug, English Bulldog and French breeds, weighing 4-20kg and aged 4-6 years were used. Blood samples were collected from bitches during the anestrous and on the 2nd, 5th, 6th, 7th and 8th week of pregnancy. Serum levels of cytokines were measured by panel MILLIPLEX MAP (CCYTO-90K, MILLIPORE, Billerica, Massachusetts, USA) validated for dogs. Twenty four females showed physiological pregnancy and three bitches showed pathological pregnancy. There was no difference between cytokine values during anestrous and gestational weeks of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dog; Immunity; Pregnancy.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000401067

Recombinant in vitro assembled hepatitis C virus core particles induce strong specific immunity enhanced by formulation with an oil-based adjuvant
Provedor de dados: 48
Autores: ACOSTA-RIVERO,NELSON; POUTOU,JOANNA; ÁLVAREZ-LAJONCHERE,LIZ; GUERRA,IVIS; AGUILERA,YARAIMA; MUSACCHIO,ALEXIS; RODRÍGUEZ,ARMANDO; AGUILAR,JULIO C; FALCON,VIVIANA; ÁLVAREZ-OBREGON,JULIO C; SORIA,YORDANKA; TORRES,DINORAH; LINARES,MARBELIS; PÉREZ,ÁNGEL; MORALES-GRILLO,JUAN; DUEÑAS -CARRERA,SANTIAGO.
In the present work, immunogenicity of recombinant in vitro assembled hepatitis C virus core particles, HCcAg.120-VLPs, either alone or in combination with different adjuvants was evaluated in BALB/c mice. HCcAg.120-VLPs induced high titers of anti-HCcAg.120 antibodies and virus-specific cellular immune responses. Particularly, HCcAg.120-VLPs induced specific delayed type hypersensitivity, and generated a predominant T helper 1 cytokine pro file in immunized mice. In addition, HCcAg.120-VLPs prime splenocytes proliferate in vitro against different HCcAg.120-specific peptides, depending on either the immunization route or the adjuvant used. Remarkably, immunization with HCcAg.120-VLPs/Montanide ISA888 formulation resulted in a significant control of...
Tipo: Journal article
Palavras-chave: Challenge; HCV; Immunity; Adjuvant; Capsid.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000100005

Effect of probiotic administration on the immune response: a systematic review of experimental models in rats
Provedor de dados: 52
Autores: Silva,Viviam de Oliveira; Foureaux,Renata de Carvalho; Araujo,Thiago Santos; Peconick,Ana Paula; Zangeronimo,Marcio Gilberto; Pereira,Luciano José.
The probiotic influence on the immune system, especially under pathogenic challenge conditions, still remains controversial. To address this, a systematic review of current studies concerning the efficacy of probiotics on the immune response of rats subjected to experimental challenges was conducted. The survey was conducted using PubMed, ISI Web of Science and Scielo databases. Only studies which tested probiotics in vivo in rats were included. The experimental design, methodological quality, and results of the articles were analyzed. In total 21 articles were selected for this study. The most commonly used microorganisms in the experiments were those of the genus Lactobacillus, which was reported in 12 articles. The second most often used genus was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Immunity; Probiotics; Rats; Dietary supplements.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000500007

Effects of Yucca Extract on Feed Efficiency, Immune and Antioxidative Functions in Broilers
Provedor de dados: 52
Autores: Su,Jun-Ling; Shi,Bin-Lin; Zhang,Peng-Fei; Sun,Deng-Sheng; Li,Ti-Yu; Yan,Su-Mei.
Effects of yucca extract (YE) on feed efficiency, immune and antioxidative function in Arbor Acres broilers were studied. One hundred and twenty-eight fourteen-day-old broiler chickens were randomly divided into four treatments with four replicates of 8 birds each. These four diets were formulated by adding 0, 100, 200 and 300 mg/kg YE to the basal diet. The results showed that: diets supplemented with 100 and 200 mg/kg YE increased average body weight gain, feed efficiency, IgG, IgM, T-AOC, CAT and SOD levels, and have positive effects on inducing immune organs' maturation. In addition, 100 mg treatment mainly improved the feed efficiency whereas 200 mg treatment mainly acted on immunity and anti-oxidation. In conclusion, YE can be used as a feed additive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Yucca product; Chicken; Feed efficiency; Immunity; Antioxidant.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100504

Baypamun® action in hamsters experimentally infected with Leptospira interrogans serogroup Canicola
Provedor de dados: 62
Autores: LANGONI,Hélio; SEABRA JÚNIOR,Rui; CABRAL,Kenio Gouveia; CUNHA,Eva Laurice Pereira.
Baypamun® is an immunity modulator recommended as prophylactic and therapeutic use. In the present study, this product was used in the hamsters experimentally infected with Leptospira interrogans serogroup canicola. The animals were divided in 5 groups, with 20 animals each. This product was used as a therapeutic, prophylactic and as adjuvant. As a therapeutic use all the animals died. Despite of eight (40.0%) survivors, the prophylactic use wasn't also totally favorable due to leptospire recovering from kidneys of those animals. Based on the analysis of antibodies levels among animals that received vaccine and vaccine with Baypamun® as adjuvante, this product didn't conferred superior humoral answer. However, other studies should be accomplished utilizing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Immunomodulators; Leptospira; Immunity.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962001000600010

Involvement of nitric oxide and its up/down stream molecules in the immunity against parasitic infections
Provedor de dados: 55
Autores: Nahrevanian,Hossein.
Nitric oxide (NO) is a potent mediator with diverse roles in regulating cellular functions and signaling pathways. The NO synthase (NOS) enzyme family consists of three major isoforms, which convey variety of messages between cells, including signals for vasorelaxation, neurotransmission and cytotoxicity. This family of enzymes are generally classified as neuronal NOS (nNOS), endothelial NOS (eNOS) and inducible NOS (iNOS). Increased levels of NO are induced from iNOS during infection; while eNOS and nNOS may be produced at the baseline in normal conditions. An association of some key cytokines appears to be essential for NOS gene regulation in the immunity of infections. Accumulating evidence indicates that parasitic diseases are commonly associated with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: INOS; Nitric oxide; NO; Immunity; Helminth; Parasite; Protozoa.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702009000600010

Seronegativity to polio viruses among previously immunized adult candidates to solid organ transplantation
Provedor de dados: 55
Autores: Brandão,Luciana Gomes Pedro; Brasil,Pedro Emmanuel Alvarenga Americano do; Oliveira,Silas de Souza; Silva,Edson Elias da; Lopes,Guilherme Santoro.
ABSTRACT In the current effort to eliminate polio from the world, it is important to recognize and vaccinate susceptible groups, especially immunocompromised patients living in countries where attenuated polio vaccine is still used. In this report, we describe the frequency of protective antibodies in a small sample of adult SOT candidates in whom previous vaccination could be ascertained. Patients included in this report were selected among the participants of an ongoing prospective study carried out at the Reference Center for Special Immunobiologicals of the Evandro Chagas National Institute of Infectious Diseases in Rio de Janeiro, Brazil. Among the first 100 patients enrolled in this study, only seven adult SOT candidates had proven polio vaccination...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Poliomyelitis; Immunity; Solid organ transplantation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702018000200150

Vaccination coverage and immunity against hepatitis B among HIV-infected patients in South Brazil
Provedor de dados: 55
Autores: Martins,Saulo; Livramento,Andréa do; Andrigueti,Michelle; Kretzer,Iara Fabricia; Machado,Marcos José; Spada,Celso; Treitinger,Arício.
Evidence-based strategies to improve the hepatitis B virus (HBV) vaccination coverage rates might help to reduce the burden caused by co-infection with HBV and human immuno-deﬁciency virus (HIV). In this study, the aim was to evaluate the vaccination coverage and immunity against HBV among HIV-infected individuals in South Brazil, and identify factors that are associated with compliance patterns and antibody reactivity. Three hundred HIV-infected men and women were included in this survey. The patients answered a standardized questionnaire, and vaccination cards were checked in order to assess hepatitis B vaccine status. A blood sample was collected for quantitative determination of antibody to hepatitis B virus surface antigen (anti-HBs). Participants...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: HIV; Hepatitis B; HBV Vaccination; Immunity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702015000200181

Immune and hormonal activity in adults suffering from depression
Provedor de dados: 56
Autores: Nunes,S.O.V.; Reiche,E.M.V.; Morimoto,H.K.; Matsuo,T.; Itano,E.N.; Xavier,E.C.D.; Yamashita,C.M.; Vieira,V.R.; Menoli,A.V.; Silva,S.S.; Costa,F.B.; Reiche,F.V.; Silva,F.L.V.; Kaminami,M.S.
An association between depression and altered immune and hormonal systems has been suggested by the results of many studies. In the present study we carried out immune and hormonal measurements in 40 non-medicated, ambulatory adult patients with depression determined by CID-10 criteria and compared with 34 healthy nondepressed subjects. The severity of the condition was determined with the Hamilton Depression Rating Scale. Of 40 depressed patients, 31 had very severe and 9 severe or moderate depression, 29 (72.5%) were females and 11 (27.5%) were males (2.6:1 ratio). The results revealed a significant reduction of albumin and elevation of alpha-1, alpha-2 and ß-globulins, and soluble IL-2 receptor in patients with depression compared to the values obtained...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Depression; Immunity; Psychoneuroimmunology; Cytokines; Acute phase proteins.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000500011

Malaria vaccine: roadblocks and possible solutions
Provedor de dados: 56
Autores: Soares,I.S.; Rodrigues,M.M.
Malaria remains the most prevalent and devastating parasitic disease worldwide. Vaccination is considered to be an approach that will complement other strategies for prevention and control of the disease in the future. In the last 10 years, intense studies aimed at the development of a malaria vaccine have provided important knowledge of the nature of the host immunological mechanisms of protection and their respective target antigens. It became well established that protective immune responses can be generated against the distinct stages of Plasmodium. However, in general, protective immune responses are directed at stage-specific antigens. The elucidation of the primary structure of these antigens made possible the generation of synthetic and recombinant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Malaria; Plasmodium; Vaccine; Immunity; Infectious disease.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000300002

Recombinant viruses as vaccines against viral diseases
Provedor de dados: 56
Autores: Souza,A.P.D.; Haut,L.; Reyes-Sandoval,A.; Pinto,A.R.
Vaccine approaches to infectious diseases are widely applied and appreciated. Amongst them, vectors based on recombinant viruses have shown great promise and play an important role in the development of new vaccines. Many viruses have been investigated for their ability to express proteins from foreign pathogens and induce specific immunological responses against these antigens in vivo. Generally, gene-based vaccines can stimulate potent humoral and cellular immune responses and viral vectors might be an effective strategy for both the delivery of antigen-encoding genes and the facilitation and enhancement of antigen presentation. In order to be utilized as a vaccine carrier, the ideal viral vector should be safe and enable efficient presentation of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vaccine; Immunity; Recombinant viruses; Viral vectors; Infectious disease.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000400004

Epidemiological and functional implications of molecular variants of human papillomavirus
Provedor de dados: 56
Autores: Sichero,L.; Villa,L.L.
Human papillomavirus genomes are classified into molecular variants when they present more than 98% of similarity to the prototype sequence within the L1 gene. Comparative nucleotide sequence analyses of these viruses have elucidated some features of their phylogenetic relationship. In addition, human papillomavirus intratype variability has also been used as an important tool in epidemiological studies of viral transmission, persistence and progression to clinically relevant cervical lesions. Until the present, little has been published concerning the functional significance of molecular variants. It has been shown that nucleotide variability within the long control region leads to differences in the binding affinity of some cellular transcriptional...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Human papillomavirus; DNA sequencing; Oncogenic potential; Cervical cancer; Immunity; Epidemiology.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000600002

Monounsaturated fats and immune function
Provedor de dados: 56
Autores: Yaqoob,P.
Animal studies suggest that olive oil is capable of modulating functions of cells of the immune system in a manner similar to, albeit weaker than, fish oils. There is some evidence that the effects of olive oil on immune function in animal studies are due to oleic acid rather than to trace elements or antioxidants. Importantly, several studies have demonstrated effects of oleic acid-containing diets on in vivo immune responses. In contrast, consumption of a monounsaturated fatty acid (MUFA)-rich diet by humans does not appear to bring about a general suppression of immune cell functions. The effects of this diet in humans are limited to decreasing aspects of adhesion of peripheral blood mononuclear cells, although there are trends towards decreases in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fatty acids; Lipids; Immunity; Olive oil; Adhesion molecules.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000400001

Comparison of agglutinating and neutralizing antibodies to serovar hardjo in sows immunized with two commercial whole culture polivalent anti-leptospira bacterins
Provedor de dados: 58
Autores: Soto,Francisco Rafael Martins; Pinheiro,Sônia Regina; Morais,Zenaide Maria; Gonçales,Amane Paldês; Azevedo,Sérgio Santos de; Bernardi,Fernanda; Camargo,Sebastião Rodrigues; Vasconcellos,Silvio Arruda.
It was performed the comparison of the intensity and duration of agglutinating and neutralizing antibodies to serovar Hardjo in swines vaccinated with two commercial anti-leptospira bacterins. Sows no reactive to 24 Leptospira sp serovars in the microscopic agglutination test (MAT) were divided in three groups: Group A (n=08): received two vaccine A doses with 30 days interval, Group B (n=08) two vaccine B doses with 30 days interval and Group C (n=08): control no vaccinated against leptospirosis.Blood samples were collected each 30 days during six months following the first vaccination. The sera were tested by MAT and growth inhibition test (GIT) to serovar Hardjo in order to evaluate respectively agglutinating and neutralizing antibodies. It was found...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Swine; Leptospirosis; Immunity; Bacterines; Vaccination.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000300013

Antibodies against rabies virus in dogs with and without history of vaccination in Santa Maria - RS - Brazil
Provedor de dados: 65
Autores: Fernandes,Karina Gonzalez; Martins,Mathias; Amaral,Bruna Portolan; Cargnelutti,Juliana Felipetto; Weiblen,Rudi; Flores,Eduardo Furtado.
ABSTRACT: The present study investigated the frequency and magnitude of neutralizing antibodies to rabies virus (RABV) in dogs with and without historic of vaccination in Santa Maria/RS. Group A included serum samples from 440 dogs with recent historic of vaccination against rabies, obtained during the 2015 rabies vaccination campaign. Group B included 300 serum samples from dogs submitted to the Veterinary Hospital of the Universidade Federal de Santa Maria in 2015, whose historic of rabies vaccination was unknown. Serum samples were submitted to the rapid fluorescent focus inhibition test (RFFIT) to detect neutralizing antibodies against RABV. In group A, 70.6% (310/440) of the samples had neutralizing antibody titers ≥0.5 international units per...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Canine; Immunity; RABV; Serological response; Vaccine.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001100452

Dietary lutein supplementation on diet digestibility and blood parameters of dogs
Provedor de dados: 65
Autores: Alarça,Laís Guimarães; Murakami,Fabiane Yukiko; Félix,Ananda Portella; Krabbe,Everton Luis; Oliveira,Simone Gisele de; Silva,Sebastião Aparecido Borges da.
ABSTRACT: The objective of the present study was to evaluate the digestibility and the immunomodulatory effects of diets supplemented with lutein in dogs. Sixteen adult dogs were distributed in two groups (control and test) in a completely randomized design. Dogs were fed for 120 days with iso-nutritive diets, which only difference was the inclusion of 45g lutein/kg in the diet fed to the test group. Blood samples were collected in the beginning and at the end of the experimental period to evaluate total lymphocyte, lymphocyte proliferation index, and CD4+ and CD8+ lymphocyte counts. In order to evaluate apparent diet digestibility, dogs were housed in metabolic cages for ten days (five days of adaptation and five for faeces total collection). Coefficients...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carotenoids; CD4+; CD8+; Immunity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001202195

Consequences of eight consecutive applications of equine chorionic gonadotropin on ovarian follicle development and ovulation in  bos indicus cows
Provedor de dados: 65
Autores: Stuhr,Bhárbara Delboni; Gil,Isaac Santos; Lacerda,Tracy Ferreira; Favoreto,Mauricio Gomes; Loureiro,Bárbara.
ABSTRACT: The equine chorionic gonadotropin (eCG) is a glycoprotein produced in mare endometrial calices. In bovine, it is used in estrus synchronization protocols. However, studies have shown that it is potentially immunogenic and its effect can decrease after repetitive use. This study aimed to evaluate antral follicle dynamics, corpus luteum (CL) and ovulation rate in bos indicus cows submitted to an estrus synchronization protocol in association with eCG for eight times consecutively. Ten cyclical, multiparous, and pasture raised beef cows were divided into two groups: control group (n=5) and eCG group (n=5). In 30 day interval, all animals were synchronized with the same estrogen/progesterone based protocol, totalizing 8 re-synchronizations. Cows in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corpus luteum; ECG; Fertility; Immunity; FTAI.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001102018

Seroconversion and seroreactivity patterns of dairy goats naturally exposed to caprine arthritis-encephalitis virus in Brazil
Provedor de dados: 65
Autores: Castro,Roberto Soares; Leite,Rômulo Cerqueira; Azevedo,Edisio Oliveira de; Resende,Maurício; Gouveia,Aurora Maria Guimarães.
A labelled avidin-biotin ELISA (lab-ELISA) using repeated serum samples of goats showed a progressive seroconversion with higher seroconversion rate at the period going from the beginning of the breeding up to the last half of lactation (35.0%), compared to that recorded at the beginning of breeding (17.8%)(p&lt;0.05). Furthermore, the seroreactivity pattern, evaluated by a lab-ELISA standard-curve with serum samples collected at 30-40 days intervals during 12 months, was caracterized by high individual variability. No seroreversion was observed and there were higher titers in the group of animals which delivered kids and established a lactation period (n=6; mean titre=913.4 units) compared to the group of goats that failed to conceived (n=4; mean...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Goat; Caprine artrhitis-encephalitis virus; Diagnostics; Enzyme immunoassays; Immunity.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782002000400009