Enzootic Bovine Leukosis
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Performance assessment of imported ELISA in the serodiagnosis of the enzootic bovine leukosis in herds of Pernambuco state, Brazil
RESUMO: A leucose enzoótica bovina (LEB) é uma doença infecciosa de distribuição cosmopolita e caráter crônico causada por um vírus da família Retroviridae, o vírus da leucemia bovina (VLB). A situação epidemiológica da LEB no Brasil vem motivando estudos para o aprimoramento do seu diagnóstico, tendo como base as técnicas sorológicas recomen
Arq. Inst. Biol.. Publicado em: 25/11/2019
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2. Análise leucométrica em bovinos tuberculinizados e sua aplicação no monitoramento da leucose enzoótica em rebanhos do Estado de Pernambuco.
Leucose Enzoótica (LEB) e Tuberculose bovina (TB) comprometem o estado imunitário dos rebanhos, especialmente pelo potencial imunodepressor do Vírus da Leucose Bovina (VLB). Inúmeros fatores interferem nos valores leucométricos dos bovinos, porém, pouco se sabe dos efeitos da TB sobre os mesmos. O objetivo com o estudo foi avaliar o leucograma de bovin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/02/2012
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3. Avaliação funcional dos fagócitos sanguíneos e lácteos de vacas naturalmente infectadas pelo vírus da leucose dos bovinos / Functional evaluation of blood and milk phagocytes of cows naturally infected by bovine leukosis virus
O vírus da leucose enzoótica bovina (VLEB) pode interferir na proporção e na funcionalidade dos linfócitos B e das demais células sanguíneas. Acreditando-se que essas alterações pudessem interferir nos mecanismos de defesa da glândula mamária, o presente estudo avaliou funcionalmente os fagócitos sanguíneos e lácteos de vacas naturalmente infec
Publicado em: 2011
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4. Influência do vírus da lecucose bovina na resposta imunitária de animais naturalmente infectados / Influence of enzootic bovine leukosis on immune response of naturally infected cattle
A Leucose Enzoótica dos Bovinos (LEB) é uma enfermidade neoplásica, infectocontagiosa, pluri-sintomática, de evolução crônica, que compromete os órgãos linfopoiéticos e está associada ao desenvolvimento de linfocitose persistente (LP) e linfossarcoma. Acarreta diminuição na produção, quer por seus efeitos danosos diretos, quer pelos indiretos.
Publicado em: 2010
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5. Expressão imunoistoquímica de p53 e bcl-2 em casos de leucose enzoótica bovina / Immunohistochemical expression of p53 and bcl-2 in enzootic bovine leukosis cases
A Leucose Enzoótica Bovina é uma doença crônica de ocorrência mundial que acomete bovinos. Seu agente etiológico é um retrovírus do mesmo grupo dos que causam a leucemia linfocítica crônica e a AIDS, importantes doenças que acometem humanos. Os retrovírus são vírus que se integram ao DNA do hospedeiro e desta forma são potencialmente mutagêni
Publicado em: 2008
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6. Influence of bovine enzootic leukosis on respiratory burst activity of leukocytes / Influência da leucose enzoótica bovina na atividade oxidativa de leucócitos
Different leukocyte populations play key roles on the elimination of foreign antigens through phagocytosis and killing by oxygen-independent and -dependent (respiratory burst) mechanisms. Assuming that Enzootic Bovine Leukosis virus (BLV), that causes a chronic disease, and affects, mainly, lymphoid tissues, alters bovine circulating leukocyte subpopulations
Publicado em: 2007
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7. Evaluation of adenosine deaminase seric activity in the diagnosis of bovine tuberculosis
Determination of seric levels of adenosine deaminase (ADA), an enzyme produced by monocytes/macrophages and lymphocytes, has been used in the diagnosis of human tuberculosis (TB). In the present study, ADA seric activity was evaluated comparatively to the comparative tuberculin test in the diagnosis of bovine tuberculosis. Two hundred fifty-six cattle were c
Memórias do Instituto Oswaldo Cruz. Publicado em: 2006-06
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8. Genomic integration of bovine leukemia provirus: comparison of persistent lymphocytosis with lymph node tumor form of enzootic.
Integration of bovine leukemia proviral DNA in the genome of infected cells was investigated in cattle affected by either the persistent lymphocytosis or the lymph node tumor form of enzootic bovine leukosis. In persistent lymphocytosis, proviral DNA was found to be integrated at a large number of genomic sites in one-fourth to one-third of circulating leuko
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9. Bilateral exophthalmos in a Holstein cow with lymphosarcoma
A 4-year-old Holstein cow presented with severe bilateral exophthalmos. A complete blood cell count revealed late stage lymphoma; the agar gel immunodiffusion test for enzootic bovine leukosis was positive. The cow was euthanized 1 wk after presentation. Necropsy revealed generalized lymphadenopathy and tumors in most organs. Final diagnosis was lymphosarcom
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10. Restriction endonuclease mapping of linear unintegrated proviral DNA of bovine leukemia virus.
A detailed restriction map was deduced for the genome of the exogenous bovine leukemia virus. The cleavage sites for nine restriction enzymes were mapped. The unintegrated linear viral DNA intermediate that is produced by infection of permissive cells with bovine leukemia virus was isolated. The linear viral DNA had a unique restriction map, indicating that
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11. Mutant Tax Protein from Bovine Leukemia Virus with Enhanced Ability To Activate the Expression of c-fos
Bovine leukemia virus (BLV) is the etiologic agent of enzootic bovine leukosis. We previously identified several mutants of the BLV Tax protein with an ability to transactivate transcription via the BLV enhancer that is significantly greater than that of the wild-type Tax protein. Moreover, the mutant proteins also activated other viral enhancers, such as th
American Society for Microbiology.
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12. Cellular pathways involved in the ex vivo expression of bovine leukemia virus.
Bovine leukemia virus (BLV) is the etiologic agent of enzootic bovine leukosis. The virus adopts a strategy based on the lack of viral expression in vivo; only very rare BLV-infected B lymphocytes express viral information. When the cells are isolated from animals in persistent lymphocytosis and cultivated ex vivo, a tremendous increase in viral expression o