Abstract:

Objective To investigate the epidemiological characteristics of foodborne pathogens in diarrhea cases in Tongzhou District of Beijing City from 2020 to 2024，and provide technical reference for prevention and control of foodborne diseases and food safety. Methods According to the requirements of the National Foodborne Disease Surveillance Manual，diarrhea cases meeting the inclusion criteria were screened in two sentinel hospitals in Tongzhou District，and clinical and food exposure information and stool samples were collected for the detection of salmonella，Vibrio para-hemolyticus and diarrheal Escherichia coli. Results A total of 1 794 cases of diarrhea were included in the surveillance，and the detection rates and dominant strains of various foodborne pathogens were Salmonella 3.07%（Salmonella enteritidis），Vibrio parahaemolyticus 1.51%（O10∶K4 type），Diarrheogenic Escherichia coli 7.75%（enterotoxic Escherichia coli）. The detection rate of diarrheal Escherichia coli（12.53%） in summer（June-August） was significantly higher than that in other seasons. Vibrio parahaemolyticus was mainly detected in the age group of 30-<45 years（3.06%），while the incidence of diarrheal Escherichia coli was higher in the age group of 18-<30 years（13.53%）. Mixed foods（27.97%） ranked first in exposure to suspicious foods. Home environment（46.34%） was the main source of suspiciously exposed food. Conclusion The detection rate of main foodborne pathogens and dominant bacterial types of diarrhea cases have changed significantly in Tongzhou District of Beijing City from 2020 to 2024. Young and middle-aged people and summer are still the key groups and seasons for monitoring，and it is necessary to strengthen the family food safety and health education work.

Key words: Foodborne pathogens, Diarrhea cases, Active surveillance