Frequência sorológica de infecções virais e bacterianas e presença de bactérias no nódulo vacinal da febre aftosa em bovinos do Rio Grande do Norte.

Abstract

The objective this paper was determinate infections rates to Bluetongue virus (BTV), Vaccinia virus (VACV), Bovine Leukemia Virus (BLV), Bovine Viral Diarrhea Virus (BVDV), Leptospira spp. and Brucella abortus in cattle of microregion of Seridó, Rio Grande do Norte State. A total of 238 serum samples of cattle were collected in thirty-five farm distributed in five municipalities. The serological tests used were agar gel immunodiffusion test (AGID) for BTV and BLV, cellular monolayer immunoperoxidase for VACV, virus neutralization for BVDV, microscopic agglutination test (MAT) for Leptospira spp. and buffed acidified antigen test (BAAT) and 2-mercaptoethanol test (2-ME) for Brucella abortus. Seropositivities observed were 3.36% (8/238) to BTV, 78.57% (187/238) to VACV, 7.98% (19/238) to BLV, 78.99% (188/238) to BVDV and 17.64% (42/238) to Leptospira spp. All farms were positive to VACV and to BVDV and two farms (5,71%) had at least one positive animal to BTV, VACV, BLV, BVDV and Leptospira spp. These diseases are endemic in the microregion with similar prevalence in the other States in Brazil. There was no positive animal to Brucella abortus.