Abstract: Objective To analyze the epidemiological characteristics of foodborne diseases in Dayi County,Chengdu from 2019 to 2023,and to provide scientific basis for formulating targeted measures for prevention and control of foodborne diseases. Methods Surveillance data of foodborne diseases in Dayi County,Chengdu from 2019 to 2023 were collected and statistically analyzed using Excel 2013 and SPSS 25.0. Indicators such as composition ratio and rate were used to describe the reporting of foodborne diseases. χ² test was used to compare the different component ratios,and Fisher exact probability method was used to test the theoretical frequency which did not meet the χ² test condition. Linear trend test was used to compare the trend changes of annual incidence and composition ratio. Results A total of 4 933 cases of foodborne diseases were reported in Dayi County,Chengdu from 2019 to 2023,and the incidence showed an increasing trend year by year（χ²_trend =38.376,P<0.05）. The number of female patients was higher than that of male patients,and the ratio of male to female was 1∶1.7. The age distribution showed the highest number of cases in the 0-<10 age group,with 1 249 cases,accounting for 25.32%,and the proportion of cases is increasing year by year. In the age distribution group,1 249 cases（25.32%） were found in 0-<10 years old,and the proportion of cases increased year by year.In the occupation distribution,farmers had the highest number,with 1 855 cases,accounting for 37.60%,and the composition ratio showed an increasing trend year by year. The seasonal distribution is mainly concentrated in the third quarter with 1 609 cases,accounting for 32.62%,and the second quarter with 1 340 cases,accounting for 27.16%. The number of cases in the third quarter showed a downward trend year by year,while the number of cases in the second quarter showed an upward trend year by year. The main symptoms were digestive system symptoms in 4 916 cases（99.66%）,followed by systemic symptoms in 1 022 cases,accounting for 20.72%. Meat and meat products accounted for the most 1 309 cases（26.54%）,followed by fruit and its products in 1 078 cases（21.85%）,and vegetables and its products in 477 cases（9.67%）. In the classification of processing and packaging methods of suspiciously exposed food,home-made food accounted for the most 2 112 cases（42.81%）,followed by bulk（including simple packaging） in 1 654 cases（33.53%）. Family was the main eating place in 3 984 cases（80.76%）,followed by catering service industry in 483 cases（9.79%）,other,retail market,collective canteen,rural banquets were less distributed. Conclusion Women,people aged 0-<10 years old and farmers are the key groups for the prevention and control of foodborne diseases in Dayi County,Chengdu. Summer and autumn are the seasons with high incidence of foodborne diseases. Therefore,targeted food safety knowledge education should be strengthened to enhance people's awareness of food safety. We will continue to strengthen food safety risk monitoring,including meat and its products,fruit and its products in the key monitoring objects,and promptly detect hidden food safety risks. The processing and packaging methods of suspected exposed foods are mainly home-made and bulk,and the supervision of food production and operation should be strengthened to reduce the risk of foodborne diseases.

Key words: Foodborne diseases, Epidemiological characteristics, Monitoring result