Occurrence of Listeria monocytogenes in Milk and Dairy Products Produced or Imported Into Morocco.

Examination of 227 samples of milk and dairy products for Listeria monocytogenes showed that raw milk and some Moroccan traditionally made dairy products such as Iben and raib (fermented milks) and jben (fresh cheese) were contaminated with this pathogen. L. monocytogenes was the only Listeria species isolated except in one case in which it was associated with Listeria innocua . Pasteurized milk, fresh cream, and fresh and ripened cheeses (industrially made) were free from L. monocytogenes .