listeria spp. associated to different levels of autochthonous microbiota in meat, meat products and processing plants listeria spp. associado a diferentes níveis da microbiota autóctone de carne, produtos cárneos e plantas de processamento

Clicks: 260
ID: 164111
2007
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Abstract
High levels of microbial contamination, commonly found in animal origin foods and food processing environments, are able to hinder the growth of pathogens in these products and interfere in the results of laboratory analyses for detection of these pathogens. With the aim of verifying the possible interference of the autochthonous microbiota encountered in meat and meat products and processing plants over the presence of Listeria spp., 443 samples, collected from 11 meat retail establishments, were submitted to microbiological analysis to determine the levels of mesophilic aerobes, total coliforms and Escherichia coli and the presence of Listeria spp., according to the methodology proposed by the USDA. The results did not show evident interference of the autochthonous microbiota over Listeria spp., once the genus was detected even in the meat, meat products and environmental samples with high levels of contamination by mesophilic aerobes and coliforms.
Altos níveis de contaminação microbiana, usualmente encontrados em alimentos de origem animal e nos ambientes de processamento, podem inibir a multiplicação de microrganismos patogênicos nesses produtos e interferir nos resultados das análises laboratoriais para o isolamento desses patógenos. Com o objetivo de verificar as possíveis interferências da microbiota autóctone encontrada na carne, produtos cárneos e plantas de processamento sobre a presença de Listeria spp., 443 amostras, coletadas em 11 estabelecimentos processadores, foram submetidas a análises microbiológicas para determinação dos níveis de contaminação por aeróbios mesófilos, coliformes totais e Escherichia coli e para verificação da presença de Listeria spp., de acordo com a metodologia proposta pelo USDA. Os resultados obtidos não mostraram uma interferência evidente da microbiota autóctone sobre Listeria spp., uma vez que esse gênero foi detectado mesmo nas amostras de carne e produtos cárneos e amostras ambientais e de superfície de equipamentos que apresentaram altos níveis de contaminação por aeróbios mesófilos e coliformes.
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Authors ;Márcia de Aguiar Ferreira Barros;Luís Augusto Nero;Aline Villas-Bôas Manoel;Loredana d'Ovídio;Lívia Cavaletti da Silva;Bernadette Dora Gombossy de Melo Franco;Vanerli Beloti
Journal ieee software
Year 2007
DOI
10.1590/S1517-83822007000400005
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000400005
Keywords
meat autochthonous microbiotamicrobiology

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