Estimativa da prevalência de Brucella spp. em propriedades produtoras de queijo minas artesanal na microrregião do Serro - Minas Gerais

Abstract

The main objective of the study is to estimate Brucella spp. prevalence in dairy herds involved in artisanal cheeses production in Serro’s micro-region, Minas Gerais state, named of “Queijo Minas Artesanal” (QMA). The pathogen's evidences (presence of DNA) in cheeses indexed by the “Instituto Mineiro de Agropecuária – IMA” with ripening periods at normal temperature between 4 and 8 days was evaluated. The results of the polymerase chain reaction (PCR) showed that the DNA of Brucella spp. prevalences in Serro's QMA was of 30.9% (17/55). The products of amplified DNA were sequenced for differentiating the bacteria’s source: if it came from the environment or from the vaccine. The DNA sequencing demonstrated 100% of homology with environment samples of Brucella ssp. All sample of cheeses were from cattletested and controlled through annual serological tests for the monitoring of brucelosis and presented negative control´s certificates delivered by autonomous veterinaries. The presence of DNA Brucella spp. in analyzed cheeses suggests a supposed deficiency of brazilian brucelosis control's program in monitoring this specific herds and that stronger measures of control should be adopted in the herds, ingredients and also in the final product as a food safety measure.