In this research, a total of 211 raw milk samples in different areas of Ankara were collected from various dairy plants. Each of these samples was tested for the presence of Yersinia enterocolitica, Listeria monocytogenes and Campylobacter spp. From a total of 14 (6.63 %) Y. enterocolitica and Y. enterocolitica-like organisms were isolated. 8 (3.79 %) of the total isolation were identified as Y. enterocolitica whereas 6 (2.84 %) of these were found to be Y. enterocolitica-like organisms. In addition L. monocytogenes and Campylobacter were detected in 2 (0.94 %) and 17 (8.05 %) same raw milk samples. Distribution of these patogenic microorganisms was evaluated according to the season. 6 of a total 14 Yersinia spp. were isolated in winter, eight in spring and summer. One of the L. monocytogenes was isolated in winter whereas the other one was isolated in spring. 7 of a total of 17 Campylobacter were isolated in the summer months.

        Key words: pathogen microorganisms, raw milk, detection