Abstract: Objective This analysis was made to explore the distribution of pathogenic microorgan ism8 in 33 case of foodborne diseases．Methods According to clinic manifestations and species of sam— ples，corresponding selective culture media were chosen，and isolation and identification of pathogenic microorganisms were performed in terms of“Microbiological testing of food hygiene”(GB4789—94)and “Manual for prevention of cholera”(issued by the Minister of Health)as well as pertinent data．Results In 33 accidental cases of foodborne diseases，63 strains of various pathogenic microorganisms from 745 samples tested were found(with a detection rate of 8．5％)，of which there were 20 strains of en—teropathogenic bacteria(8 saimonella，7 bacillus proteus，3 enteropathogenic escherichia coli and 2 Sh．dysenteriae)，accounting for 31．8％；19 strains of pathogenic vibrio(9 bacillus comma，4 vibrio metschnikovii，3 vibrio carchariae，2 vibrio mimicus and 1 vibrio parahaemolyticus)，accounting for 30．2％；5 strains of bacillus cereus，with a rate of 7．9％；5 strains of plesimonas shigelloides，account—ing for 7．9％；2 strains of staphylococcus aureus，accounting for 3．2％；12 positive samples of stellavirus(antigens of stellavirus in feces were determined by ELISA)，with a rate d 19．0％．Conclusion Enteropathogenic bacteria and pathogenic vibrio hold precedence among various microorgan—isms jsolated from 33 GaSas of foodborne diseases．