ResumoO objetivo desta pesquisa foi estabelecer a ocorrência de Listeria monocytogenes em diversos pontos de plantas de processamento de carne bovina em 01 abatedouro e 05 casas de carnes localizados na região norte do Paraná. Para a detecção de Listeria spp. em 124 amostras de equipamentos/utensílios e instalações, utilizou-se a metodologia preconizada pelo United States Departament of Agriculture (USDA), com identificação das espécies por testes bioquímicos e posterior confirmação pelo API Listeria (bioMérieux). Os resultados obtidos indicaram freqüências de 6,25% de L. monocytogenes; 68,75% de L. innocua; 18,75% de L. welshimeri; 4,17% de L. seeligeri e 2,08% de L. grayi. As amostras positivas para L. monocytogenes tiveram origem em equipamentos de casa de carnes como caixas plásticas e amaciador. Palavras-chave: Listeria monocytogenes, processamento de carne, equipamentos, planta de processamento de carne. AbstractThe goal of this research was to establish the occurrence of Listeria monocytogenes in several points of meat processing plants such as 01 slaughterhouse and 05 butcher's shops sited at north region of Paraná State. The United States Department of Agriculture (USDA) isolation methodology of Listeria spp. was used in 124 samples of equipments/utensils and environmental sources, with species identification by biochemical tests and confirmation by API Listeria (bioMérieux). The results showed frequencies of 6,25% for L. monocytogenes; 68,75% for L. innocua; 18,75 for L. welshimeri; 4,17% for L. seeligeri and 2,08% of L. grayi. The positive samples for L. monocytogenes were equipments of butcher's shops, as plastic boxes and tendering machine.
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