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Food Science and Technology
Article . 2006 . Peer-reviewed
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Food Science and Technology
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Enterotoxigenicidade de Staphylococcus spp. isolados de leite in natura

Authors: Stamford, Tânia Lúcia Montenegro; Silva, Celiane Gomes Maia da; Mota, Rinaldo Aparecido; Cunha Neto, Adelino da;

Enterotoxigenicidade de Staphylococcus spp. isolados de leite in natura

Abstract

Os alimentos sao passiveis de contaminacao por diferentes agentes etiologicos, podendo levar a doencas manifestadas por acao de microorganismos patogenicos ou suas toxinas. Pesquisou-se a ocorrencia de cepas de Staphylococcus, assim como a sua capacidade para producao de enterotoxinas em leite produzido e/ou comercializado no Estado de Pernambuco, Brasil. Foram isoladas e selecionadas 109 cepas de Staphylococcus coagulase positiva e negativa de leite in natura. A identificacao das cepas isoladas foi realizada por meio de testes morfologicos e bioquimicos, como: testes de catalase, coagulase, hemolise, DNAse, termonuclease, producao de acetoina (VP) e metabolismo de carboidratos (glicose, maltose e manitol). Das 77 cepas coagulase positivas foram identificadas S. aureus (30), S. hyicus (3), S. intermedius (16), S. aureus identificacao presuntiva (13) e Estafilococos Coagulase Positiva (SCP) (15). Das 32 cepas coagulase negativa foram identificadas S. capitis (2), S. carnosus (1), S. chromogenes (6), S. hyicus (1), S. schleiferi (1) e Estafilococos Coagulase Negativa (SCN) (21). Foram selecionadas 43 cepas que apresentaram reacoes de termonuclease evidentes, para analise de enterotoxinas estafilococicas, realizada pelo teste imunoenzimatico ELISA. Os resultados obtidos evidenciaram dez cepas com reacao negativa para enterotoxinas: S. aureus (4), S. carnosus (1), S. chromogenes (2), S. hyicus (2) e S. intermedius (1). Entre as cepas enterotoxina positiva, foram encontrados: S. aureus (17), S. chromogenes (2), S. hyicus (1), S. intermedius (8), S. aureus identificado presuntivamente (2), cepas do grupo SCP (1) e as do SCN (2). As especies que apresentaram maior numero de linhagens enterotoxigenicas foram: S. aureus e S. intermedius. Esses resultados podem ser atribuidos a manipulacao inadequada do leite e/ou a recontaminacao durante o seu armazenamento e distribuicao.

Keywords

enterotoxinas, milk, enterotoxins, food, Staphylococcus, alimentos, leite

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
16
Average
Top 10%
Average
Green
gold