OCCUPATION AND HEALTH ›› 2026, Vol. 42 ›› Issue (7): 927-932.

• Treatise • Previous Articles     Next Articles

Analysis of foodborne disease surveillance results in Nan'an District of Chongqing City from 2020 to 2024

YANG Siyu, ZHANG Min, YUAN Lingyan()   

  1. Chongqing Nan'an District Center for Disease Control and PreventionChongqing 400066, China
  • Received:2025-07-04 Revised:2025-07-31 Online:2026-04-01 Published:2026-05-14

Abstract:

Objective To analyze the epidemiological characteristics of foodborne diseases in Nan'an District of Chongqing City from 2020 to 2024,and provide reference for developing prevention and control strategies of foodborne disease. Methods Data on foodborne disease cases reported by 23 sentinel hospitals in Nan'an District of Chongqing City from 2020 to 2024 were collected. Clinical specimens were randomly collected from selected diarrheal cases for pathogenic testing,and the monitoring data were analyzed. Results A total of 6 815 foodborne disease cases were reported in Nan'an District of Chongqing City from 2020 to 2024,with annual incidence rates of 6.93,9.09,11.47,13.60,and 15.32 per 10 000 person-years,respectively,showing a statistically significant upward trend(P<0.01). The incidence peaked in summer and autumn. Females accounted for 54.54% of cases. The highest incidence occurred in individuals aged 25-<35 years(18.33%),and high-risk occupations included homemakers/unemployed individuals(18.06%) and students(15.77%). Most cases were clustered in Tianwen Subdistrict,Danzishi Subdistrict,and Jiguanshi Town. The distribution of suspected exposed food showed that meat and meat products were the most common suspected food exposures(27.26%),with certain food categories showing seasonal variations(P<0.05). Home-prepared foods accounted for 36.98% of exposures. Pathogens were detected in 75 of 1 064 specimens(7.05%),including norovirus(67.10% of detection rate),Salmonella(26.32%),and diarrheagenic Escherichia coli(6.58%). Norovirus was predominantly detected in the third and fourth quarters,Salmonella peaked in the second quarter,and diarrheagenic Escherichia coli was only detected in the third quarter. Conclusion The high-risk populations for foodborne diseases in Nan'an District of Chongqing City are homemakers/unemployed individuals and students,with distinct seasonal and age-specific patterns. The primary pathogens are norovirus and Salmonella. It is recommended to carry out special monitoring in high-risk seasons and populations,strengthen the monitoring of foodborne pathogens,and reduce the risk of foodborne diseases.

Key words: Food safety, Foodborne diseases, Incidence rate, Etiology, Epidemiological characteristics, Chongqing City

CLC Number: