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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/85

Title: Isolation of listeria monocytogenes from smoked cheese
Authors: Al-Zoreky, Nageb
Keywords: Listeria monocytogenes
Cheese
Taiz
Yemen
Microorganism
Issue Date: 1998
Publisher: King Saud University
Citation: Journal of King Saud University, Agricultural Sciences: 10 (2); 163-168
Abstract: Samples of smoked, salted cheese were collected from local markets of the city of Taiz. They were tested for the presence of Listeria monocytogenes . Data revealed that the pathogen was only recovered from 12.5% of cheese samples anayzed under this study. Other listeria] species were not isolated from cheese, directly plated onto selective agar media. Direct plating gave very ]ow counts (20 CFU/g or less) of L. monocytogenes, naturally contaminated smoked cheese. Selective enrichment of samples at 370C for 48 hr was necessary for isolating Listeria spp., present in cheese along with other co-contaminating microflora. The natural microflora of smoked cheese, especially Enterococci and Staphyocoeci, grew or developed diagnostic traits similar to those of L. monocytogenes in Listerial selective agar (Oxoid) . When increased volumes (>0.2ml) of samples were spread, Alzoreky- Sandine Listeria Medium (ASLM) recovered contaminated listeriae while inhibiting indigenous microorganisms of cheese. Results of this investigation emphasize the need to adopt a standard procedure for manufacturing smoked cheese in Yemen.
URI: http://hdl.handle.net/123456789/85
Appears in Collections:Journal of the King Saud University - Agricultural Sciences

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