English summary: Results of the study on all food services in Bac Giang province showed that: Percentage of food samples contaminated with E coli and Coliforms exceeding permissible limits was 71.3% of fresh porl; 12.2% of ready to eat pork; 62.1% of raw vegetables; 28.8% of cooked vegetables; 17.5% of starchy products; and 12.9% of beverage.