EFFECT OF BACTERIAL AGENTS OF PORCINE RESPIRATORY DISEASE COMPLEX ON PRODUCTIVE INDICES AND SLAUGHTER WEIGHT

Authors

Abstract

Porcine respiratory disease complex comprises the interaction of two or more infectious agents. The major bacterial agents involved were investigated in 115 finishing pigs at a farm in São Paulo State, Brazil: Actinobacillus pleuropneumoniae (serology, bacterial culture, and multiplex PCR), Mycoplasma hyopneumoniae (Mhyo) (nested PCR), Pasteurella multocida (multiplex PCR), Haemophilus parasuis (PCR multiplex), and Streptococcus sp. (bacterial culture). Macroscopic and microscopic lung lesions were evaluated, and zootechnical indices were recorded. Mhyo occurred in 113 animals (98.3%), seventeen of which were co-infected with Streptococcus sp. The finding of emphysematous lung was associated with significantly lower final and carcass weight at slaughter. Although vaccinated against Mhyo with an inactivated immunogen, almost 100% of the animals were infected. Mhyo infection with and without Streptococcus sp. co-infection was related to lung lesions of varying degrees and lower slaughter and carcass weight.
Keywords: differential diagnosis, Mycoplasma hyopneumoniae, pleuropneumonia, Streptococcus sp., swine

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Author Biographies

Talita Brombilla, Instituto Biológico, São Paulo, SP

Mestrado senso estrito em Sanidade, Segurança Alimentar e Ambiental no Agronegócio. Área de Concentração: Segurança Alimentar e Sanidade no Agroecossistema.

Renato Akio Ogata, Instituto Biológico, São Paulo, SP

Centro de Pesquisa e Desenvolvimento de Sanidade Animal, Laboratório de Doenças de Suínos Washington Sugay

Alessandra Figueiredo de Castro Nassar, Instituto Biológico, São Paulo, SP

Centro de Pesquisa e Desenvolvimento de Sanidade Animal, Laboratório de Bacteriologia Geral

Maristela Vasconcelos Cardoso, Instituto Biológico, São Paulo, SP

Centro de Pesquisa e Desenvolvimento de Sanidade Animal, Laboratório de Doenças Bacterianas da Reprodução

Vera Letticie de Azevedo Ruiz, Faculdade de Zootecnia e Engenharia de Alimentos - FZEA/USP - Pirassununga, SP

Laboratório de Doenças Infectoparasitárias de Animais Domésticos

Claudia Del Fava, Instituto Biológico, São Paulo, SP

Centro de Pesquisa e Desenvolvimento de Sanidade Animal, Laboratório de Anatomia Patológica

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Published

2019-10-24

How to Cite

BROMBILLA, T.; OGATA, R. A.; NASSAR, A. F. de C.; CARDOSO, M. V.; RUIZ, V. L. de A.; DEL FAVA, C. EFFECT OF BACTERIAL AGENTS OF PORCINE RESPIRATORY DISEASE COMPLEX ON PRODUCTIVE INDICES AND SLAUGHTER WEIGHT. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 20, p. 1–12, 2019. Disponível em: https://revistas.ufg.br/vet/article/view/51615. Acesso em: 24 nov. 2024.

Issue

Vol. 20 (2019): Continuous publication

Section

MEDICINA VETERINÁRIA

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