Occurrence of Yersinia enterocolitica in milk and dairy products in Morocco.
A total of 227 samples of milk and dairy products were examined for the presence of Yersinia enterocolitica. Yersinia spp. were recovered from 11 of 30 raw milks (36.6%), one of 20 pasteurized milks (5%), 15 of 63 traditional fermented milks (23.8%), seven of 94 cheeses and one of 20 cream samples (5%). The overall incidence of Y. enterocolitica in milk and dairy products was 6.6%. The other Yersinia species were Y. intermedia, Y. kristensenii, Y. frederiksenii and Y. pseudotuberculosis. Y. enterocolitica was detected only in raw milk (30% of the samples), in traditional fermented milks (6.3%) and in raw milk-made cheese (4%). The majority of the Y. enterocolitica isolates were of biotype 1 (environmental strains). The Celfulodin-Irgasan-Novobiocin (CIN) Agar was found to be more efficient than the Mac Conkey Agar in the isolation of Yersinia organisms.
Hamama
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Department of HIDADA, Institut Agronomique et Vétérinaire Hassan II, Rabat Instituts, Rabat, Morocco.
el Marrakchi
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el Othmani
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D000818:Animals; D003611:Dairy Products / Q000382:microbiology*; D005506:Food Contamination; D008892:Milk / Q000382:microbiology*; D009018:Morocco; D015008:Yersinia enterocolitica / Q000302:isolation & purification*