03961nab a2200361 i 4500003000900000005001700009008004100026040001800067072002100085100001800106100003300124100003400157100002400191100002500215100002200240100002300262100003100285100004100316100002900357245013500386500006500521520124700586520132901833650001803162650002003180650001603200650002503216650002903241773022503270856007703495942000803572999001903580BR-BrBNA20241204161611.0241204b2017    bl.mr|pooa||| 00| 0 eng |  aBR-BrBNAbeng  aH60b1410 - 3876  aWitter, Rute   aMelo, Andréia Lima Tomé   aPacheco, Thábata dos Anjos   aMeneguzzi, Mirella   aBoas, Ricardo Vilas   aDutra, Valéria   aNakazato, Luciano   aChitarra, Cristiane Silva   aOliveira, Anderson Castro Soares de   aPacheco, Richard Campos   aPrevalence of ‘Candidatus Mycoplasma haemobos’ detected by PCR, in dairy cattle from Ji-Paraná in the north region of Brazil  aPublicação on-line; 19 ref.; 2 tables; Sumaries (En, Pt)  a

ABSTRACT - The municipality of Ji-Paraná, Rondônia, 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-Paraná 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  a

RESUMO - O município de Ji-Paraná, Rondônia, é uma das principais áreas de produção leiteira na região norte do Brasil. Assim, é importante avaliar agentes infecciosos que apresentam potencial para afetar negativamente a produtividade na indústria. O objetivo deste estudo foi investigar a prevalência de ‘Candidatus Mycoplasma haemobos’ usando um método de detecção baseado na PCR e relacionar com variáveis do rebanho leiteiro (frequência de aborto, nascimento de bezerros fracos, número total de vacas, número de vacas >24 meses de idade, tamanho da propriedade e, sistema de produção) na agricultura familiar do município de Ji-Paraná, região norte, Brasil. Amostras de sangue foram coletadas de 320 vacas  A prevalência total de ‘Ca. M. haemobos’ foi de 64,2% e a prevalência por rebanho foi de 95,3%; o número de vacas >24 meses de idade nas propriedades estudadas correlacionouse com as taxas de infecção por ‘Ca. M. haemobos’. Considerando a importância da indústria de laticínios para a área de estudo, investigações adicionais são necessárias para avaliar o efeito da infecção crônica nestes animais na produção de leite e saúde do rebanho.

Palavras-chave: hemoplasmas, micoplasmas hemotrópicos, rebanho leiteiro.  aGADO LEITEIRO  aDOENÇA ANIMAL  aRONDÔMICA  aAGRICULTURA FAMILIAR  aLEVANTAMENTO SANITÁRIO0 024089346529dSanta Maria-RS Universidade Federal de Santa Maria - Centro de Ciências Rurais 1991o2024-7200tCiência Rural (Brazil)x0103-8478   Versão online ISSN 1678-4596gv. 47(3) p. 1-6 ; (2017)wBR2024003829  uhttps://www.scielo.br/j/cr/a/78TQcwjt4bDpPPJgv5ZWKkQ/?format=pdf&lang=en  cANA  c329033d329033