Abstract:Abstract: OBJECTIVE To investigate the epidemiological characteristics and etiological patterns of non-statutory notifiable infectious diarrhea in Songjiang District of Shanghai from 2018 to 2023.It aims to offer scientific evidence for optimizing local diarrheal disease control strategies.METHODS Case records of non-specific infectious diarrheal diseases were systematically retrieved from the China Infectious Disease Surveillance Reporting System,a retrospective descriptive analysis was conducted.RESULTS Among 3,366 laboratory-confirmed cases,the crude annual incidence averaged 29.25/100,000 population,demonstrating a significant declining trend(x²=675.44,P<0.01).Distinct seasonal patterns emerged:viral agents predominatedin colder months (winter- spring),whereas bacterial pathogens demonstrated higher activity in warmer seasons(summer-autumn).Rotavirus accounted for 35.0%of identified pathogens,followed by Salmonella(20.0%).The incidence rate of male was slightly higher than that of female,and children under the age of 6 were the high incidence group(49.5%).In terms of occupation distribution,scattered children,school and nursery children are the main groups,and the incidence rate in urban streets was higher.The annual incidence rate of each street and town was statisticallyifferent(x²=300.38,P<0.01).CONCLUSION From 2018 to 2023,other infectious diarrhea outbreaks in Songjiang District generally showed a downward trend,with seasonal and regional high incidence.Children aged 0-6 years are the most susceptible population.It is suggested to strengthen health education for key populations and regions,improve the completeness of pathogen surveillance and reporting,so as to reduce the incidence.