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The Enzootic Bovine Leukosis (LEB) is a disease caused by a retrovirus, with cases reported in all the world and gradually spreads determining losses to Brazilian cattle. The objective of the study is defining the seroprevalence of LEB in cattle slaughtered in the city of Anchieta, Espírito Santo. 933 serum samples was collected in the slaughter line during the month of November 2013. The samples were examined by the immunodiffusion test in agar gel (IDGA) for the detection of specific antibodies against bovine leukosis virus (VLB). The test was performed following manufacturer's instructions Tecpar ®. The prevalence detected was 21.86 %, 204 samples was soropositive for the LEB. The prevalence found in this study is lower than 39.8% found by Birgel Junior et al., (2006) with is the media of the southeast region. However, the prevalence is very expressive, showing that LEB is already widespread in the beef cattle in Espírito Santo, and that has total conditions to bring considerable losses to cattle in the state.

Ocorrência da Leucose Enzoótica no gado bovino abatidos sob Inspeção Estadual no Estado do Espírito Santo no ano de 2013