ISOLATION OF LISTERIA SPECIES FROM RAW MILK AND SOME DAIRY PRODUCTS

Document Type : Research article

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Abstract

A total of 180 random samples of milk and some milk products (Kareish cheese and Ice cream) were collected from different sources in Assiut and examined for the presence of listeria sp < /em>ecies. The obtained results pointed out that 1.25%, 2% and 2% of the examined milk, kareish cheese and ice cream were positive for listeria monocytogenes. While L. innocua could be isolated from 3.75%, 2%
and 2% of the examined samples respectively. Furthermore, 1.25%. 2% and 4% of milk, kareish cheese and ice cream contained L.welshimeri. Two methods for enrichment were performed. Pathogenicity of L.monocytogenes to mice were studied. The public health importance as well as recommended sanitary measures were discussed.

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