SciELO - Scientific Electronic Library Online

vol.22 número2Ácaros foréticos em beija-flores dos Andes (Trochilidae) de Caldas, Colômbia índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados




Links relacionados


Revista Brasileira de Parasitologia Veterinária

versão On-line ISSN 1984-2961


GRAU, Hermann Eduardo Gonzalez; CUNHA FILHO, Nilton Azevedo da; PAPPEN, Felipe Geraldo  e  FARIAS, Nara Amélia da Rosa. Transplacental transmission of Anaplasma marginale in beef cattle chronically infected in southern Brazil. Rev. Bras. Parasitol. Vet. [online]. 2013, vol.22, n.2, pp.189-193. ISSN 1984-2961.

In this study, we have investigated the incidence of transplacental transmission of Anaplasma marginale in chronically infected cows with no history of acute anaplasmosis during gestation. In addition, we evaluated various techniques for detection of transplacental transmission ofA. marginale. Blood samples were collected from 30 cows at three different periods: at the time of artificial insemination, at gestational diagnosis, and after calving. Also, blood was collected from the newborn calves, including one sample before colostrum intake, and another three days after birth. A. marginale-specific antibodies were detected in 100% of the cows with an indirect fluorescent antibody test (IFAT), and in 97% of them, using an indirect enzyme-linked immunosorbent assay (ELISA). Also, we observed that all of the three-day-old newborn calves were seropositive by IFAT. According to polymerase chain reaction, 63.3% of the cows were carriers of A. marginale, as well as 6.7% of the newborn calves. This represented a transplacental transmission rate of 10.5%. Furthermore, a correlation of 93.3% was observed between the two serodiagnostic techniques, demonstrating that both ELISA and IFAT can be used in epidemiological surveys of A. marginale. These results confirm the occurrence of transplacental transmission of A. marginale in chronically infected cows and suggest the importance of this transmission route in areas of enzootic instability.

Palavras-chave : Anaplasma marginale; transplacental transmission; enzootic instability.

        · resumo em Português     · texto em Inglês     · Inglês ( pdf )