الفهرس 
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Abstract
Two hundered random samples of raw milk and dairy products were examined in this study including 80 raw milk samples (30 samples from dairy shops and 50 samples from farmers) and 30 samples each of kariesh cheese, plain yoghurt, milk powder and infant formula. Samples were collected randomly from local dairy shops, farmers and from pharmacies in Mansoura city, Dakhalia governorate, Egypt. The collected samples were transferred directly to the laboratory with a minimum of delay in an insulated ice box (4oC) to be examined bacteriologically.
The bacteriological examination of collected samples was done for evaluation of hygienic quality of raw milk, plain yoghurt and kariesh cheese by determining the total coliforms counts.
The results revealed that coliforms was observed with a percentage of 42.0%, 25.0% and 23.0% in raw milk (farmers), kariesh cheese and yoghurt samples, respectively, with mean counts 2.80x106±0.73x105, 2.30×106 ±0.75×104, 1.08×106± 1.50×104 cfu/g or ml, respectively, which indicated high coliform contamination and failed to be detected in dairy shops raw milk, milk powder and powdered infant formula.
The results revealed that incidene of E. aerogenes, E. agglomerans, E. cloacae, C. diversus, C. freundii, E. coli, K. oxytoca and K. pneumonia in isolates of raw milk were 1.19%, 1.19%, 2.38%, 25%, 15.48%, 26.19%, 13.09%, 15.48%, respectively.