Microbiological quality of Minas frescal cheese traded in Zona da Mata Mineira

• Autor(a) principal: Souza, Iury Antônio de
• Data de Publicação: 2017
• Outros Autores: Giovannetti, Ana Cristina da Silva, Santos, Luiz Guilherme de Freitas, Gandra, Scarlet Ohana Da Silva, Martins, Maurilio Lopes, Ramos, Alcinéia de Lemos Souza
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista do Instituto de Laticínios Cândido Tostes
• Texto Completo: https://www.revistadoilct.com.br/rilct/article/view/598
• topic: fresh cheese, Escherichia coli, coagulase positive staphylococci, Listeria monocytogenes, Salmonella sp., food safety.; Qualidade Microbiológica de Alimentos; queijo fresco; Escherichia coli; estafilococos coagulase positiva; Listeria monocytogenes; Salmonella sp.; segurança dos alimentos

This study aimed to evaluate the microbiological quality of Minas frescal cheese traded in Zona da Mata Mineira, Brazil. The samples were collected at six cities: Juiz de Fora (33), Cataguases (7), Itamarati de Minas (4), Belmiro Braga (2), Bicas (2) and Rio Pomba (2), totaling 50 brands, being 43 of industrial production and seven informal. Analyses of pH, Aw, coliforms at 35 ºC and 45 ºC, Escherichia coli, coagulase positive staphylococci, Staphylococcus aureus, Listeria monocytogenesand Salmonella sp. were held in the period from October 2015 to January 2016. The pH values ranged from 4,98 to 7,14, and Aw from 0,989 to 0,904. All samples, regardless of origin, showed coliform at 35 ºC, with values ranging between 1,5 x 101 a 1,1 x 106 NMP/g. Among samples, 20 (40%) showed the Most Probable Number of coliforms at 45 ºC above the maximum limit set by Brazilian law, with a rate of 1,2x 105 MPN/g. The presence of E. coli was confirmed in 16 (32%) samples. Counts of coagulase positive staphylococci were also above the limit accepted in 16 (32%) samples, and 10 (20%) presented S. aureus. It was not detected L. monocytogenes in any sample, however, Salmonella sp. was confirmed in 20 (40%) samples. It was verified that only 11 (22%) samples were in accordance with Brazilian legislation. Therefore, the Minas frescal cheese commercialized in the region presented low microbiological quality, suggesting deficiencies in the processing, transport, storageand/or commercialization and danger to human health.