Detection of Listeria in raw and pasteurized milk.

One hundred raw milk samples from different regions of Anatolia and 20 pasteurized milk samples from three different manufacturers in Ankara were analyzed for the presence of Listeria spp. L. monocytogenes was found in 1% of the raw milk samples and in 5% (1/20) of the pasteurized milk samples. L. innocua and L. seeligeri were found in 8 and 2% of the raw milk samples, respectively. No other species of Listeria was found. The overall incidence of Listeria spp. was 10% in the raw milk samples and 5% in the pasteurized milk samples.