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Registros recuperados: 11
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Aggravation of pathogenesis mediated by aflatoxin B1 in mice infected with Trypanosoma brucei rhodesiense OAK
Kibugu, J.K; Makumi, J.N; Ngeranwa, J.J.N; Kagira, J.M; Gathumbi, J.K; Mwangi, J.N.
Aflatoxins are known to alter the pathogenesis of many infectious diseases, but such effects have not been evaluated in trypanosome infections. The aim of the present work was to assess the effects of aflatoxin B1 on the pathogenesis of Trypanosoma brucei rhodesiense infection using a murine model. Mice fed on 0.50 mg/kg aflatoxin b. wt. were infected with T. b. rhodesiense and compared to trypanosome infected and uninfected aflatoxin-fed controls. The clinical and pathological changes were determined and the quantitative data statistically analysed using standard methods. The results showed that infected aflatoxin-fed mice had pronounced dyspnoea, significantly (P<0.05) reduced survival, extreme emaciation, pronounced macrocytic normochromic anaemia...
Palavras-chave: Aflatoxin B1; Trypanosomiasis; Pathogenesis; Mice.
Ano: 2009 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2384
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Bacterial disease in marine bivalves, a review of recent studies: Trends and evolution ArchiMer
Paillard, Christine; Leroux, Frederique; Borrego, Juan.
The main microbial diseases affecting marine cultured bivalves have been revised on the basis of the etiologic agents, pathogenesis and pathogenicity. Several recent bivalve-interaction models have been studied, including Pecten larvae-Vibrio pectinicida, brown ring disease, juvenile oyster disease, Pacific oyster nocardiosis and summer mortalities of oysters. In addition, the taxonomy and phylogeny of new potential bivalve pathogens and their virulence factors have been established. Facing the difficulty of identifying bacterial strains associated with molluscan diseases (mainly vibriosis), polyphasic approaches have been developed to correlate the phenotype and genotype of potential pathogens. By evaluating likely virulence mechanisms, developing...
Tipo: Text Palavras-chave: Diagnostic tools; Virulence factors; Pathogenicity; Pathogenesis; Etiology; Bivalve mollusc; Vibriosis.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/publication-407.pdf
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Bacterial diseases in marine bivalves ArchiMer
Travers, Marie-agnes; Miller, Katherine Boettcher; Roque, Ana; Friedman, Carolyn S..
Bivalve aquaculture is seriously affected by many bacterial pathogens that cause high losses in hatcheries as well as in natural beds. A number of Vibrio species, but also members of the genera Nocardia and Roseovarius, are considered important pathogens in aquaculture. The present work provides an updated overview of main diseases and implicated bacterial species affecting bivalves. This review focuses on aetiological agents, their diversity and virulence factors, the diagnostic methods available as well as information on the dynamics of the host-parasite relationship.
Tipo: Text Palavras-chave: Vibrio; Nocardia; Roseovarius; Rickettsia; Pathogenesis; Diagnostic.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00274/38532/37049.pdf
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Caracterização bioquímica de isolados de Pasteurella multocida. Repositório Alice
REBELATTO, R.; OLIVEIRA FILHO, J. X. de; BELLAVER, F. A. V.; SERVELIN, E. C.; SILVA, G. B.; MORES, M. A. Z.; MORES, N.; KLEIN, C. S..
2013
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Sanidade animal; Suíno; Pasteurelose; Animal diseases; Swine; Pathogenesis; Pasteurella multocida.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/979697
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Cellular and molecular hemocyte responses of the Pacific oyster, Crassostrea gigas, following bacterial infection with Vibrio aestuarianus strain 01/32 ArchiMer
Labreuche, Yannick; Lambert, Christophe; Soudant, Philippe; Boulo, Viviane; Huvet, Arnaud; Nicolas, Jean-louis.
The strategies used by bacterial pathogens to circumvent host defense mechanisms remain largely undefined in bivalve molluscs. In this study, we investigated experimentally the interactions between the Pacific oyster (Crassostrea gigas) immune system and Vibrio aestuarianus strain 01/32, a pathogenic bacterium originally isolated from moribund oysters. First, an antibiotic-resistant V. aestuarianus strain was used to demonstrate that only a limited number of bacterial cells was detected in the host circulatory system, suggesting that the bacteria may localize in some organs. Second, we examined the host defense responses to V. aestuarianus at the cellular and molecular levels, using flow-cytometry and real-time PCR techniques. We showed that hemocyte...
Tipo: Text Palavras-chave: Crassostrea gigas; Oyster; Pathogenesis; Vibrio aestuarianus; Bivalve immunity.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-2182.pdf
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Combination of a pesticide exposure and a bacterial challenge: In vivo effects on immune response of Pacific oyster, Crassostrea gigas (Thunberg) ArchiMer
Gagnaire, Beatrice; Gay, Melanie; Huvet, Arnaud; Daniel, Jean-yves; Saulnier, Denis; Renault, Tristan.
To assess the impact of pollution induced by pesticides on Pacific oyster, Crassostrea gigas, health in France, in vivo effects of combined pesticide exposure and bacterial challenge on cell activities and gene expression in hemocytes were tested using flow cytometry and real-time PCR. As a first step, an in vivo model of experimental contamination was developed. Pacific oysters were exposed to a mixture of eight pesticides (atrazine, glyphosate, alachlor, metolachlor, fosetyl-alumimium, terbuthylazine, diuron and carbaryl) at environmentally relevant concentrations over a 7-day period. Hemocyte parameters (cell mortality, enzyme activities and phagocytosis) were monitored using flow cytometry and gene expression was evaluated by real-time PCR (RT-PCR)....
Tipo: Text Palavras-chave: Gene expression; Flow cytometry; Vibrio splendidus; Pathogenesis; Phagocytosis; Hemocyte; Pesticides; Bivalve immunity; Crassostrea gigas; Pacific oyster.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3022.pdf
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Diagnostico das qualidades fisiologica e sanitaria de sementes de soja produzidas em quatro estados brasileiros. Repositório Alice
COSTA, N.P.; MESQUITA, C.M.; MAURINA, A.C.; BORDINGNON, J.R.; MANDARINO, J. M. G.; FRANÇA-NETO, J. B.; KRZYZANOWSKI, F. C.; HENNING, A. A.; PEREIRA, J.E..
Este estudo teve como objetivo diagnosticar as qualidade fisiologicas e sanitaria de sementes produzidas nas principais regioes produtoras de soja no Brasil. No Parana foram avaliadas sementes dos cultivares BR-16, FT-Abyara, BR-37, Embrapa 48, FT-2000, FT-2002, OCEPAR 13 E OCEPAR 14. Em Minas Gerais foram coletadas amostras dos cvs. Conquista, Paiaguas, Doko-RC e CAC-1. Em Goias foram analisadas os cvs. Conquista, Cristalina, Doko-RC, Emgopa 314, Emgopa-315 e FT-104 e no Rio Grande do Sul, especificamente na regiao de Erechim, foram amostradas sementes dos cultivares BR-16 e Embrapa-66. Os parametros utilizados para avaliar a qualidade fisiologica das sementes foram germinacao (%), vigor (TZ 1-3), viabilidade (TZ 1-5), deterioracao por umidade (TZ 6-8),...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Soja; Semente; Qualidade; Vigor; Soybean; Seed; Quality; Dano mecanico; Mechanical damage; Patogeno; Pathogenesis.
Ano: 1999 URL: http://www.alice.cnptia.embrapa.br/handle/doc/461157
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DNA Banding Patterns of Trichomonas vaginalis Strains Isolated from Symptomatic and Asymptomatic Subjects OAK
Sapru, Kusum; Mohan, K.; Gupta, Indu; Ganguly, N. K.; Mahajan, R. C.; Malla, Nancy.
Palavras-chave: Trichomonas vaginalis; Trichomoniasis; DNA banding pattern; Pathogenesis.
Ano: 1994 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/203
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Efeitos da temperatura nos períodos de incubação e geração, diâmetro das lesões, esporulação e infecção de seringueira por isolados de Microcyclus ulei de diferentes regiões. Repositório Alice
GASPAROTTO, L.; JUNQUEIRA, N. T. V.; NORMANDO, M. C. S.; LIMA, M. I. P. M..
Comparam-se os efeitos da temperatura nos períodos de incubação (PI) e de geração (PG) na esporulação, diâmetro das lesões, associado ao molhamento foliar (MF) na infecção da seringueira por seis isolados de Microcyclus ulei.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Mal das folha; Brasil; Amazonas; Rubber tree; Species; Fungal diseases; South American leaf blight; Doença; Espécie; Folha; Fungo; Hevea; Microcyclus Ulei; Patogenicidade; Seringueira; Temperatura; Leaves; Pathogenesis; Temperature.
Ano: 1989 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/667162
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Vibriosis induced by experimental cohabitation in Crassostrea gigas: Evidence of early infection and down-expression of immune-related genes ArchiMer
De Decker, Sophie; Saulnier, Denis.
The understanding of reciprocal interactions between Crassostrea gigas and Vibrio sp., whether these be virulent or avirulent, is vital for the development of methods to improve the health status of cultured oysters. We describe an original non-invasive experimental infection technique using cohabitation, designed to explore these interactions. Using real-time PCR techniques we examined the dynamics of virulent and avirulent Vibrio sp. in oyster hemolymph and tank seawater, and made a parallel study of the expression of four genes involved in oyster immune defense: Cg-BPI, Cg-EcSOD, Cg-IκB, Cg-TIMP. No mortality occurred in control animals, but oysters put in cohabitation for 2–48 h with animals previously infected by two Vibrio pathogens suffered...
Tipo: Text Palavras-chave: Oyster-Vibrio interactions; Pathogenesis; Immune response; Non-invasive experimental challenge; Real-time PCR.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00025/13604/10681.pdf
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Virulence of oral Fusobacterium nucleatum from humans and non-human primates in mice BJM
Gaetti-Jardim Júnior,Elerson; Luvizotto,Maria C. Rui; Avila-Campos,Mario J..
The lethal action in Balb/c mice of 80 oral Fusobacterium nucleatum recovered from patients with adult periodontitis, healthy subjects or Cebus apella monkeys was studied. Mice were inoculated intraperitoneally with each bacterial inoculum of 5 x 10(8) CFU/ml. All the clinical isolates induced weight and coordinated movements loss. Pathological alterations in liver, CNS, heart, and kidney with inflammatory reactions or vascular congestion were observed. Of all the tested F. nucleatum isolates, 61.2% from periodontal patients, 57.1% from healthy subjects and 60% from monkeys, were capable of killing the mice in 48h. The clinical isolates were significantly more pathogenic than F. nucleatum ATCC 10953 or ATCC 25586. B. fragilis ATCC 23745 showed lethality...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fusobacterium nucleatum; Pathogenesis; Human and non-human primates.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000200016
Registros recuperados: 11
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