Contaminação microbiana em tofu industrial
| Autor: | Thaís Teresa Brandão Cavalheiro Ribeiro, Marisa da Costa, Géssica Aracéli Costa |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Staphylococcus 030106 microbiology Biology Microbial contamination Contaminação de alimentos lcsh:Agriculture 03 medical and health sciences coliforms 0404 agricultural biotechnology mesophile Food science lcsh:Agriculture (General) mesófilos General Veterinary Alimentos de soja lcsh:S 04 agricultural and veterinary sciences lcsh:S1-972 040401 food science coagulase soy cheese queijo de soja Animal Science and Zoology Agronomy and Crop Science coliformes |
| Zdroj: | Ciência Rural v.47 n.3 2017 Ciência Rural Universidade Federal de Santa Maria (UFSM) instacron:UFSM Repositório Institucional da UFRGS Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS Ciência Rural, Volume: 47, Issue: 3, Article number: 20160234, Published: 12 DEC 2016 Ciência Rural, Vol 47, Iss 3 |
| Popis: | EnglishThis study aimed to evaluate the microbiological quality of tofu sold in supermarkets in Porto Alegre/Brazil. Bacteria counts were performed for Bacillus cereus , mesophilic, coliforms and Staphylococcus coagulase positive and negative. The presence of Listeria sp. was also evaluated. Two different brands of tofu (A and B) were collected, one lot per month, for six months. Five samples from each lot were analyzed. All lots presented mesophilic aerobic counts above 4.3x105CFU g-1. Four of the six lots from brand A and all lots from brand B showed E. coli and/or Staphylococcus coagulase positive counts above the Brazilian law accepted limits. The Staphylococcus coagulase negative counts were higher than those of coagulase positive in all lots. In all lots where Staphylococcus coagulase positive counts were above the legal limit, there were counts of coagulase negative above 104CFU g-1. B. cereus and Listeria sp. were not found in either brand. The majority of lots of brand A and all lots of brand B were unsuitable for human consumption. Our results showed that there are problems in tofu manufacturing in both industries analyzed. There is a need of improvement on its microbial quality to avoid problems of food-borne illness, and finally the need of a better control by the Brazilian inspection services. Key words: soy cheese; mesophile; coliforms; Staphylococcus; coagulase portuguesEste estudo teve como objetivo avaliar a qualidade microbiologica de queijo tofu comercializados em um supermercado da cidade de Porto Alegre, RS. Foram realizadas contagens de Bacillus cereus , bacterias mesofilas, coliformes, Staphylococcus coagulase positive e negativo e, a pesquisa de Listeria sp. Foi realizada a coleta de duas diferentes marcas (A e B), com um lote por mes, durante seis meses; sendo analisadas cinco amostras de cada lote. Todos os lotes apresentaram contagens de mesofilos aerobios acima de 4,3x105UFC g-1. Quatro dos seis lotes da marca A e todos os lotes da marca B apresentaram contagens de E. coli e/ou Staphylococcus coagulase positive acima do permitido pela legislacao vigente. As contagens de Staphylococcus coagulase negativos foram superiores as contagens dos coagulase positivos em todos os lotes. Nos lotes em que foram encontradas contagens fora do padrao estabelecido para os Staphylococcus coagulase positivos, havia contagens dos coagulase negativos acima de 104UFC g-1. Nao foram isolados B. cereus e Listeria sp. Ambas as marcas apresentaram serios problemas sanitarios, pois a maioria dos lotes da marca A e todos os lotes da marca B estavam improprios para o consumo mesmo na ausencia dos outros patogenos pesquisados. Nossos resultados mostram que ha problemas serios na producao de tofu em ambas as industrias analisadas. Existe a necessidade de melhorias no sistema de producao para evitar a ocorrencia de doencas causadas por este alimento e, tambem, que deve haver um maior controle da qualidade deste alimento pelos servicos de fiscalizacao. Palavras-chave: queijo de soja; mesofilos; coliformes; Staphylococcus; coagulase |
| Databáze: | OpenAIRE |
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