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Prevalence of 'Candidatus Mycoplasma haemobos' detected by PCR, in dairy cattle from Ji-Parana in the north region of Brazil/Prevalencia de 'Candidatus Mycoplasma haemobos' pela PCR, em bovinos leiteiros de Ji-Parana na regiao norte do Brasil
The municipality of Ji-Parana, Rondonia, is one of the major dairy production areas in the north region of Brazil. Thus, it is important to evaluate infectious agents that have the potential to negatively affect productivity in the industry. The objective of this study was to investigate the prevale...
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Published in: | Ciência rural 2017-03, Vol.47 (3) |
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Main Authors: | , , , , , , , , , |
Format: | Article |
Language: | English |
Online Access: | Get full text |
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Summary: | The municipality of Ji-Parana, Rondonia, is one of the major dairy production areas in the north region of Brazil. Thus, it is important to evaluate infectious agents that have the potential to negatively affect productivity in the industry. The objective of this study was to investigate the prevalence of Candidatus Mycoplasma haemobos ' by using a PCR-based detection method and correlate this with dairy herd variables (abortion frequency, weak calf birth rate, total cattle number, >24-month-old cow number, farm size, and production system) in family farms of the Ji-Parana municipality, north region, Brazil. Blood samples were collected from 320 dairy cows located across 64 farms(i.e., five animals per farm) from September 2012 to November 2013. Overall prevalence of Ca. M. haemobos' was 64.2% and prevalence per herd was 95.3%; the number of >24-month-old cows in the farms studied correlated with Ca. M. haemobos' infection rates. Considering the importance of the dairy industry to the study area, additional investigations are necessary to evaluate the effect of chronic infection in these animals on milk production and herd health. Key words: hemoplasmas, hemotropic mycoplasmas, dairy herd. O municipio de Ji-Parana, Rondonia, e uma das principais areas de producao leiteira na regiao norte do Brasil. Assim, e importante avaliar agentes infecciosos que apresentam potencial para afetar negativamente a produtividade na industria. O objetivo deste estudo foi investigar a prevalencia de Candidatus Mycoplasma haemobos ' usando um metodo de deteccao baseado na PCR e relacionar com variaveis do rebanho leiteiro (frequencia de aborto, nascimento de bezerros fracos, numero total de vacas, numero de vacas >24 meses de idade, tamanho da propriedade e, sistema de producao) na agricultura familiar do municipio de Ji-Parana, regiao norte, Brasil. Amostras de sangue foram coletadas de 320 vacas leiteiras localizadas em 64 fazendas (ou seja, cinco animais por exploracao) de setembro de 2012 a novembro de 2013. A prevalencia total de Ca. M. haemobos' foi de 64,2% e a prevalencia por rebanho foi de 95,3%; o numero de vacas >24 meses de idade nas propriedades estudadas correlacionouse com as taxas de infeccao por Ca. M. haemobos'. Considerando a importancia da industria de laticinios para a area de estudo, investigacoes adicionais sao necessarias para avaliar o efeito da infeccao cronica nestes animais na producao de leite e saude do rebanho. Palavras-chave: hemoplasmas, micopl |
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ISSN: | 0103-8478 |
DOI: | 10.1590/0103-8478cr20160805 |