A total of 200 samples of fresh beef meat, imported frozen meat, locally frozen minced meat and raw chicken meat (each of 50) were obtained 162 Assiut Vet. Med. J. Vol. 41 No. 82, July 1999 randomly from different butcher shops; supermarkets and chicken slaughter shops in Mansoura city El-Dakahlia province Egypt for the presence of Yersinia spp. Overall Yersinia spp. was recovered from 8.5% of the examined samples. The isolation rate was dependent on the meat type and, these bacteria were isolated from fresh beef meat, imported frozen meat; locally frozen minced meat and raw chicken meat in percentage 6%, 12%, 10% and 6% respectively. The contamination rate of Y.enterocolitica in tested meats was 2-8%, except for fresh beef meat from which no Y. enterocolitica was recovered. Other species of Yersinia (Y intermedia; Y.Fredreksenii and Y.kristensenii) was isolated from 6% of all samples. Two of Y. enterocolitica isolates from imported frozen meat belonged to pathogenic biotype 4. Other Y enterococlitica isolates were regarded as environmental strains which belonged to biotype IA. Also the public health inportance of these organisms were discussed.