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Heat stress and vitamin E in diets for broilers as a mitigating measure Animal Sciences
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
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Importance of CD8 T cell-mediated immune response during intracellular parasitic infections and its implications for the development of effective vaccines Anais da ABC (AABC)
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
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Welfare indicators for laying Japanese quails caged at different densities Anais da ABC (AABC)
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
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Probiotic level effects on growth performance, carcass traits, blood parameters, cecal microbiota, and immune response of broilers Anais da ABC (AABC)
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
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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) Arq. Bras. Med. Vet. Zootec.
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<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
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Profile of IL-2, IL-4, IL-10, IFN- γ , TNF- α and KC-like cytokines in pregnant bitches Arq. Bras. Med. Vet. Zootec.
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
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Recombinant in vitro assembled hepatitis C virus core particles induce strong specific immunity enhanced by formulation with an oil-based adjuvant Biol. Res.
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
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Effects of Yucca Extract on Feed Efficiency, Immune and Antioxidative Functions in Broilers BABT
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
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Effect of probiotic administration on the immune response: a systematic review of experimental models in rats BABT
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
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Baypamun® action in hamsters experimentally infected with Leptospira interrogans serogroup Canicola Braz. J. Vet. Res. Anim. Sci.
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
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Involvement of nitric oxide and its up/down stream molecules in the immunity against parasitic infections BJID
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
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Vaccination coverage and immunity against hepatitis B among HIV-infected patients in South Brazil BJID
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
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Seronegativity to polio viruses among previously immunized adult candidates to solid organ transplantation BJID
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
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Epidemiological and functional implications of molecular variants of human papillomavirus BJMBR
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
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Malaria vaccine: roadblocks and possible solutions BJMBR
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
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Monounsaturated fats and immune function BJMBR
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
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Immune and hormonal activity in adults suffering from depression BJMBR
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
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Recombinant viruses as vaccines against viral diseases BJMBR
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
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Comparison of agglutinating and neutralizing antibodies to serovar hardjo in sows immunized with two commercial whole culture polivalent anti-leptospira bacterins BJM
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
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Antibodies against rabies virus in dogs with and without history of vaccination in Santa Maria - RS - Brazil Ciência Rural
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
Registros recuperados: 73
Primeira ... 1234 ... Última
 

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