Diagnóstico histopatológico, imuno-histoquímico e molecular da paratuberculose subclínica na Região Sul do Estado do Rio de Janeiro. 2013

Detalhes bibliográficos
Autor(a) principal: Yamasaki, Elise Miyuki
Data de Publicação: 2013
Tipo de documento: Tese
Idioma: por
Título da fonte: Biblioteca Digital de Teses e Dissertações da UFRRJ
Texto Completo: https://rima.ufrrj.br/jspui/handle/20.500.14407/9779
Resumo: A dificuldade no diagnóstico da paratuberculose na fase assintomática está relacionada principalmente à resposta imune do hospedeiro frente aos diversos estágios da enfermidade; a maioria dos animais infectados por Mycobacterium avium subsp. paratuberculosis (Map) não apresenta e não apresentará sinais clínicos característicos da enfermidade ao longo de sua vida e pode eliminar, intermitentemente, o agente infeccioso no ambiente, através das fezes, mantendo a infecção no rebanho. Atualmente, os testes laboratoriais disponíveis para diagnóstico subclínico da paratuberculose apresentam baixa eficiência, o que limita o diagnóstico precoce da enfermidade e contribui para a ineficiência das medidas de controle da infecção no rebanho. O desenvolvimento de técnicas confiáveis e específicas para a detecção “post-mortem” da paratuberculose possibilita o diagnóstico antes do aparecimento dos sinais clínicos, e pode auxiliar na elaboração de novos testes para detecção “in vivo” da infecção. No Brasil, a paratuberculose já foi descrita em diversas espécies de ruminantes e em vários estados, no entanto, não há programas sanitários oficiais para o controle da enfermidade. Um dos objetivos deste trabalho foi detectar a infecção pré-clínica da paratuberculose em bovinos oriundos de rebanho positivo para paratuberculose por metodologias de diagnóstico anátomopatológico. Foram realizados estudos histopatológico, histoquímico e imuno-histoquímico de intestino delgado e linfonodos mesentéricos coletados no frigorífico local. À histopatologia, observaram-se lesões compatíveis com paratuberculose em animais assintomáticos; bacilos álcool-ácido resistentes não foram visualizados e a imuno-histoquímica mostrou marcação positiva em alguns fragmentos analisados. A partir dos resultados, podemos afirmar que o teste de imuno-histoquímica pode ser uma importante ferramenta para detecção de Map, especialmente em tecidos com lesões tuberculoide ou “paucibacillary”, enriquecendo os métodos convencionais de diagnóstico histopatológico para confirmação da infecção. Além disso, em situações onde não há disponibilidade de material para cultivo bacteriano pode-se utilizar desta metodologia para conclusão do diagnóstico. Na segunda parte do trabalho, foi realizado um estudo comparativo de duas soluções fixadoras de tecido, uma contendo formol, substância tradicionalmente utilizada em laboratórios de patologia e a outra composta por sais de zinco. O intuito do estudo foi avaliar a manutenção da histomorfologia, a capacidade de detecção de bacilos álcool-ácido resistentes e antígenos de Mycobacterium spp. por imunohistoquímica e amplificação dos fragmentos de DNA bovino e de Mycobacterium avium subsp. paratuberculosis por PCR GAPDH, IS900 e F57, em fragmentos de íleo e linfonodo mesentérico fixados, de bovino com paratuberculose clínica. Avaliaram-se, também, possíveis alterações causadas em diferentes períodos de tempo em que os fragmentos foram mantidos na solução fixadora. Verificou-se notável manutenção da arquitetura do tecido em fragmentos fixados em solução de zinco, com qualidade da imagem histológica similar aos tecidos fixados em formol; os resultados obtidos pela coloração de Ziehl-Neelsen e imunohistoquímica foram semelhantes nos dois fixadores. Já a PCR mostrou amplificação apenas nas amostras fixadas em zinco, o que demonstra que este fixador pode ser uma ferramenta importante para manutenção de ácidos nucleicos e macromoléculas para estudos genéticos e proteômicos.
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spelling Yamasaki, Elise MiyukiTokarnia, Carlos Maria Antônio Hubinger239.959.637-49239.959.637-49http://lattes.cnpq.br/7809700501564538Brito, Marilene de FariasMcIntosh, DouglasMalafaia, Pedro Antonio MunizMota, Rinaldo AparecidaCarvalho, Eulógio Carlos Queiroz de270.751.428-44270.751.428-44http://lattes.cnpq.br/34644814944780592023-12-21T18:44:10Z2023-12-21T18:44:10Z2013-02-18YAMASAKI, Elise Miyuki. Diagnóstico histopatológico, imuno-histoquímico e molecular da paratuberculose subclínica na Região Sul do Estado do Rio de Janeiro. 2013. 100 f. Tese (Doutorado em Ciências Veterinárias) - Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, 2013.YAMASAKI, Elise Miyuki. Diagnóstico histopatológico, imuno-histoquímico e molecular da paratuberculose subclínica na Região Sul do Estado do Rio de Janeiro. 2013. 100 f. Tese (Doutorado em Ciências Veterinárias) - Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, 2013.https://rima.ufrrj.br/jspui/handle/20.500.14407/9779A dificuldade no diagnóstico da paratuberculose na fase assintomática está relacionada principalmente à resposta imune do hospedeiro frente aos diversos estágios da enfermidade; a maioria dos animais infectados por Mycobacterium avium subsp. paratuberculosis (Map) não apresenta e não apresentará sinais clínicos característicos da enfermidade ao longo de sua vida e pode eliminar, intermitentemente, o agente infeccioso no ambiente, através das fezes, mantendo a infecção no rebanho. Atualmente, os testes laboratoriais disponíveis para diagnóstico subclínico da paratuberculose apresentam baixa eficiência, o que limita o diagnóstico precoce da enfermidade e contribui para a ineficiência das medidas de controle da infecção no rebanho. O desenvolvimento de técnicas confiáveis e específicas para a detecção “post-mortem” da paratuberculose possibilita o diagnóstico antes do aparecimento dos sinais clínicos, e pode auxiliar na elaboração de novos testes para detecção “in vivo” da infecção. No Brasil, a paratuberculose já foi descrita em diversas espécies de ruminantes e em vários estados, no entanto, não há programas sanitários oficiais para o controle da enfermidade. Um dos objetivos deste trabalho foi detectar a infecção pré-clínica da paratuberculose em bovinos oriundos de rebanho positivo para paratuberculose por metodologias de diagnóstico anátomopatológico. Foram realizados estudos histopatológico, histoquímico e imuno-histoquímico de intestino delgado e linfonodos mesentéricos coletados no frigorífico local. À histopatologia, observaram-se lesões compatíveis com paratuberculose em animais assintomáticos; bacilos álcool-ácido resistentes não foram visualizados e a imuno-histoquímica mostrou marcação positiva em alguns fragmentos analisados. A partir dos resultados, podemos afirmar que o teste de imuno-histoquímica pode ser uma importante ferramenta para detecção de Map, especialmente em tecidos com lesões tuberculoide ou “paucibacillary”, enriquecendo os métodos convencionais de diagnóstico histopatológico para confirmação da infecção. Além disso, em situações onde não há disponibilidade de material para cultivo bacteriano pode-se utilizar desta metodologia para conclusão do diagnóstico. Na segunda parte do trabalho, foi realizado um estudo comparativo de duas soluções fixadoras de tecido, uma contendo formol, substância tradicionalmente utilizada em laboratórios de patologia e a outra composta por sais de zinco. O intuito do estudo foi avaliar a manutenção da histomorfologia, a capacidade de detecção de bacilos álcool-ácido resistentes e antígenos de Mycobacterium spp. por imunohistoquímica e amplificação dos fragmentos de DNA bovino e de Mycobacterium avium subsp. paratuberculosis por PCR GAPDH, IS900 e F57, em fragmentos de íleo e linfonodo mesentérico fixados, de bovino com paratuberculose clínica. Avaliaram-se, também, possíveis alterações causadas em diferentes períodos de tempo em que os fragmentos foram mantidos na solução fixadora. Verificou-se notável manutenção da arquitetura do tecido em fragmentos fixados em solução de zinco, com qualidade da imagem histológica similar aos tecidos fixados em formol; os resultados obtidos pela coloração de Ziehl-Neelsen e imunohistoquímica foram semelhantes nos dois fixadores. Já a PCR mostrou amplificação apenas nas amostras fixadas em zinco, o que demonstra que este fixador pode ser uma ferramenta importante para manutenção de ácidos nucleicos e macromoléculas para estudos genéticos e proteômicos.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES, Brasil.The difficulty of diagnosis of subclinical paratuberculosis (Johne´s disease), caused by Mycobacterium avium subsp. paratuberculosis (Map), is mainly related to host immune responses to the different stages of infection; the majority of infected animals does not and will not present throughout their life clinical signs characteristic of the disease, and can intermittently eliminate the infectious agent through feces into the environment, keeping the infection in the herd. Currently, the laboratory tests available for the diagnosis of subclinical paratuberculosis are unsatisfactory, limiting the early diagnostic of the disease and contribute to the inefficiency of control measures for infection in the herd. The development of reliable and specific techniques for detecting paratuberculosis at “post-mortem” examination could allow preclinical diagnosis contribute to development of a new test for “in vivo” diagnosis of the infection. In Brazil, paratuberculosis has been reported from different ruminant species and has a broad geographic distribution; however, there exists no official program for control of the disease. An objective of this study was to detect preclinical infection of paratuberculosis in cattle through pathological methodologies for the diagnosis in paratuberculosis positive herds. Histopathological, histochemical and immunohistochemical studies of the small intestine and mesenteric lymph nodes collected in the slaughter house were performed. Histopathology revealed lesions compatible with paratuberculosis in asymptomatic cattle, without visualization of acid-fast bacilli, and immunohistochemistry resulted in positive staining in some fragments analyzed. The results obtained in this study show that immunohistochemistry could be an important tool for detecting Map, especially in tissues with few mycobacteria, and enrich conventional methods for histopathological confirmation of the diagnosis of Johne´s disease. Additionally, in situations where there is no availability of material for culture, this methodology could be used for diagnostic conclusion. - In the second part of this study, we compared two tissue fixative solutions: one containing formaldehyde, traditionally used in pathology laboratories, and the other consisting of zinc salts. The purpose was to evaluate (1) the maintenance of histomorphology, (2) the ability to detect acid-fast bacilli and antigens of Mycobacterium spp. by immunohistochemistry, and (3) the amplification of DNA fragments of Mycobacterium avium subsp. paratuberculosis by PCR IS900 and F57 in sections of formaldehyde fixed ileum and mesenteric lymph nodes from cattle with paratuberculosis. Also were evaluated possible variations caused by different time periods during which the fragments were kept in the fixative solution. We found that (1) the zinc-based fixative showed remarkable maintenance of tissue architecture with similar histological image quality of tissues fixed in formalin, (2) the results obtained by Ziehl- Neelsen staining and immunohistochemistry were similar with the two fixative solutions used. However, PCR amplification was observed only with samples fixed in zinc salts, what demonstrates that this latter fixative can be an important tool for maintenance of nucleic acids and macromolecules for genetic and proteomic studies.application/pdfporUniversidade Federal Rural do Rio de JaneiroPrograma de Pós-Graduação em Ciências VeterináriasUFRRJBrasilInstituto de VeterináriaParatuberculose subclínicaDiagnóstico laboratorialPatologia.Subclinical paratuberculosisLaboratorial diagnosticPathologyCiências AgráriasDiagnóstico histopatológico, imuno-histoquímico e molecular da paratuberculose subclínica na Região Sul do Estado do Rio de Janeiro. 2013Histopathological diagnosis, immunohistochemical and molecular subclinical paratuberculosis in the Region Southern State of Rio de Janeiro. 2013info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisABRAHAMSEN, H. N. et al. 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dc.title.por.fl_str_mv Diagnóstico histopatológico, imuno-histoquímico e molecular da paratuberculose subclínica na Região Sul do Estado do Rio de Janeiro. 2013
dc.title.alternative.eng.fl_str_mv Histopathological diagnosis, immunohistochemical and molecular subclinical paratuberculosis in the Region Southern State of Rio de Janeiro. 2013
title Diagnóstico histopatológico, imuno-histoquímico e molecular da paratuberculose subclínica na Região Sul do Estado do Rio de Janeiro. 2013
spellingShingle Diagnóstico histopatológico, imuno-histoquímico e molecular da paratuberculose subclínica na Região Sul do Estado do Rio de Janeiro. 2013
Yamasaki, Elise Miyuki
Paratuberculose subclínica
Diagnóstico laboratorial
Patologia.
Subclinical paratuberculosis
Laboratorial diagnostic
Pathology
Ciências Agrárias
title_short Diagnóstico histopatológico, imuno-histoquímico e molecular da paratuberculose subclínica na Região Sul do Estado do Rio de Janeiro. 2013
title_full Diagnóstico histopatológico, imuno-histoquímico e molecular da paratuberculose subclínica na Região Sul do Estado do Rio de Janeiro. 2013
title_fullStr Diagnóstico histopatológico, imuno-histoquímico e molecular da paratuberculose subclínica na Região Sul do Estado do Rio de Janeiro. 2013
title_full_unstemmed Diagnóstico histopatológico, imuno-histoquímico e molecular da paratuberculose subclínica na Região Sul do Estado do Rio de Janeiro. 2013
title_sort Diagnóstico histopatológico, imuno-histoquímico e molecular da paratuberculose subclínica na Região Sul do Estado do Rio de Janeiro. 2013
author Yamasaki, Elise Miyuki
author_facet Yamasaki, Elise Miyuki
author_role author
dc.contributor.author.fl_str_mv Yamasaki, Elise Miyuki
dc.contributor.advisor1.fl_str_mv Tokarnia, Carlos Maria Antônio Hubinger
dc.contributor.advisor1ID.fl_str_mv 239.959.637-49
239.959.637-49
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/7809700501564538
dc.contributor.advisor-co1.fl_str_mv Brito, Marilene de Farias
dc.contributor.referee1.fl_str_mv McIntosh, Douglas
dc.contributor.referee2.fl_str_mv Malafaia, Pedro Antonio Muniz
dc.contributor.referee3.fl_str_mv Mota, Rinaldo Aparecida
dc.contributor.referee4.fl_str_mv Carvalho, Eulógio Carlos Queiroz de
dc.contributor.authorID.fl_str_mv 270.751.428-44
270.751.428-44
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/3464481494478059
contributor_str_mv Tokarnia, Carlos Maria Antônio Hubinger
Brito, Marilene de Farias
McIntosh, Douglas
Malafaia, Pedro Antonio Muniz
Mota, Rinaldo Aparecida
Carvalho, Eulógio Carlos Queiroz de
dc.subject.por.fl_str_mv Paratuberculose subclínica
Diagnóstico laboratorial
Patologia.
topic Paratuberculose subclínica
Diagnóstico laboratorial
Patologia.
Subclinical paratuberculosis
Laboratorial diagnostic
Pathology
Ciências Agrárias
dc.subject.eng.fl_str_mv Subclinical paratuberculosis
Laboratorial diagnostic
Pathology
dc.subject.cnpq.fl_str_mv Ciências Agrárias
description A dificuldade no diagnóstico da paratuberculose na fase assintomática está relacionada principalmente à resposta imune do hospedeiro frente aos diversos estágios da enfermidade; a maioria dos animais infectados por Mycobacterium avium subsp. paratuberculosis (Map) não apresenta e não apresentará sinais clínicos característicos da enfermidade ao longo de sua vida e pode eliminar, intermitentemente, o agente infeccioso no ambiente, através das fezes, mantendo a infecção no rebanho. Atualmente, os testes laboratoriais disponíveis para diagnóstico subclínico da paratuberculose apresentam baixa eficiência, o que limita o diagnóstico precoce da enfermidade e contribui para a ineficiência das medidas de controle da infecção no rebanho. O desenvolvimento de técnicas confiáveis e específicas para a detecção “post-mortem” da paratuberculose possibilita o diagnóstico antes do aparecimento dos sinais clínicos, e pode auxiliar na elaboração de novos testes para detecção “in vivo” da infecção. No Brasil, a paratuberculose já foi descrita em diversas espécies de ruminantes e em vários estados, no entanto, não há programas sanitários oficiais para o controle da enfermidade. Um dos objetivos deste trabalho foi detectar a infecção pré-clínica da paratuberculose em bovinos oriundos de rebanho positivo para paratuberculose por metodologias de diagnóstico anátomopatológico. Foram realizados estudos histopatológico, histoquímico e imuno-histoquímico de intestino delgado e linfonodos mesentéricos coletados no frigorífico local. À histopatologia, observaram-se lesões compatíveis com paratuberculose em animais assintomáticos; bacilos álcool-ácido resistentes não foram visualizados e a imuno-histoquímica mostrou marcação positiva em alguns fragmentos analisados. A partir dos resultados, podemos afirmar que o teste de imuno-histoquímica pode ser uma importante ferramenta para detecção de Map, especialmente em tecidos com lesões tuberculoide ou “paucibacillary”, enriquecendo os métodos convencionais de diagnóstico histopatológico para confirmação da infecção. Além disso, em situações onde não há disponibilidade de material para cultivo bacteriano pode-se utilizar desta metodologia para conclusão do diagnóstico. Na segunda parte do trabalho, foi realizado um estudo comparativo de duas soluções fixadoras de tecido, uma contendo formol, substância tradicionalmente utilizada em laboratórios de patologia e a outra composta por sais de zinco. O intuito do estudo foi avaliar a manutenção da histomorfologia, a capacidade de detecção de bacilos álcool-ácido resistentes e antígenos de Mycobacterium spp. por imunohistoquímica e amplificação dos fragmentos de DNA bovino e de Mycobacterium avium subsp. paratuberculosis por PCR GAPDH, IS900 e F57, em fragmentos de íleo e linfonodo mesentérico fixados, de bovino com paratuberculose clínica. Avaliaram-se, também, possíveis alterações causadas em diferentes períodos de tempo em que os fragmentos foram mantidos na solução fixadora. Verificou-se notável manutenção da arquitetura do tecido em fragmentos fixados em solução de zinco, com qualidade da imagem histológica similar aos tecidos fixados em formol; os resultados obtidos pela coloração de Ziehl-Neelsen e imunohistoquímica foram semelhantes nos dois fixadores. Já a PCR mostrou amplificação apenas nas amostras fixadas em zinco, o que demonstra que este fixador pode ser uma ferramenta importante para manutenção de ácidos nucleicos e macromoléculas para estudos genéticos e proteômicos.
publishDate 2013
dc.date.issued.fl_str_mv 2013-02-18
dc.date.accessioned.fl_str_mv 2023-12-21T18:44:10Z
dc.date.available.fl_str_mv 2023-12-21T18:44:10Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/doctoralThesis
format doctoralThesis
status_str publishedVersion
dc.identifier.citation.fl_str_mv YAMASAKI, Elise Miyuki. Diagnóstico histopatológico, imuno-histoquímico e molecular da paratuberculose subclínica na Região Sul do Estado do Rio de Janeiro. 2013. 100 f. Tese (Doutorado em Ciências Veterinárias) - Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, 2013.
YAMASAKI, Elise Miyuki. Diagnóstico histopatológico, imuno-histoquímico e molecular da paratuberculose subclínica na Região Sul do Estado do Rio de Janeiro. 2013. 100 f. Tese (Doutorado em Ciências Veterinárias) - Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, 2013.
dc.identifier.uri.fl_str_mv https://rima.ufrrj.br/jspui/handle/20.500.14407/9779
identifier_str_mv YAMASAKI, Elise Miyuki. Diagnóstico histopatológico, imuno-histoquímico e molecular da paratuberculose subclínica na Região Sul do Estado do Rio de Janeiro. 2013. 100 f. Tese (Doutorado em Ciências Veterinárias) - Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, 2013.
url https://rima.ufrrj.br/jspui/handle/20.500.14407/9779
dc.language.iso.fl_str_mv por
language por
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