Characterization of Enterobacteriaceae strains isolated from spoiled dry-cured hams

A.Losantos; C.Sanabria; I.CornejoA.V.Carrascosa

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Characterization of Enterobacteriaceae strains isolated from spoiled dry-cured hams

机译：Characterization of Enterobacteriaceae strains isolated from spoiled dry-cured hams

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Microbiological and physicochemical aspects of spoiled specimens of dry-cured hams affected by deep putrefaction were studied. Total aerobe (10~3-10~4 cfu g~(-1)), Micrococcaceae (10~4 cfu g~(-1)) and lactic acid bacteria (<10~2 cfu g~(-1)) were present at the same levels as in unspoiled control hams. The overall hygienic quality of the hams was good, even when spoiled. Only Enterobacteriaceae counts (10~2-10~3 cfu g~(-1)) were higher in spoiled dry-cured hams. pH (5.85-6.09) and A_w (0.888-0.909) were similar in spoiled and unspoiled hams. Thirty strains of the family Enterobacteriaceae were isolated and characterized. The strains were identified as Serratia liquefaciens and Proteus vulgais. The strains of S.liquefaciens were slightly lipolytic, proteolytic, and psychrotrophic. Only two strains of this species were able to grow at an A_w level of 0.949. The strains of P.vulgaris were not lipolytic, were strongly proteolytic and only slightly psychrotrophic, and were able to grow at an A_w level of 0.949. None of them were able to grow at an A_w level of 0.929. The results indicate that the isolated strains could have caused deep putrefaction of dry-cured hams, growing during the first non-refrigerated steps of the curing process before the decrease of A_w. Enterobacteriaceae ought therefore to be considered a microbial quality-related hazard in the development of HACCP systems for dry-cured ham.

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来源
《Food Microbiology》 |2000年第5期|505-512|共8页
作者
A.Losantos; C.Sanabria; I.CornejoA.V.Carrascosa;
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作者单位

Instituto de Fermentaciones Industriales (CSIC). c Juan de la Clerva 3. 28006 Madrid, Spain;

Instituto de Tecnologia Agroalimentaria, Consejeria de Agricultura and Comercio, Junta de Extremadura, Aptdo. 22, 06080 Badajoz, Spain;

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收录信息美国《科学引文索引》(SCI);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类食品工业;
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Characterization of Enterobacteriaceae strains isolated from spoiled dry-cured hams

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