Objective  To analyze the epidemiiologic characteristics of infectious diarrhea in Jiangjin district, Chongqing, from 2016 to 2019, and provide scientific basis and support for infectious diarrhea prevention and control.

  Methods  The incidence data of infectious diarrhoea in Jiangjin from 2016 to 2019 were collected from National Disease Control and Prevention Information System. The descriptive epidemiology method was used to analyze the characteristics of infectious diarrhoea. The disability adjusted life year (DALY) was estimated to evalaute the disease burden caused by infectious diarrhea in each year. The spatiotemporal scan statistic was used to explore the spatiotemporal clustering of cases, and ArcMap 10.2 was used to visualize the analysis results.

  Results  From 2016 to 2019, a total of 4 670 cases of infectious diarrhoea were reported in Jiangjin, including 1 death, and the annual average incidence rate was 84.72/100 000. The male to female ratio of infectious diarrhea cases was 1.174∶1, and the incidence rate was highest in the age group <5 years (1128.69/100 000). The cases in children outside child care settings accounted for the highest proportion (73.30%). The incidence peak was during November-March. Spatiotemporal scanning further found that the most likely clustering areas were 4 streets including Jijiang, Dingshan, Shuangfu and Degan (LLR=281.73, RR=4.44, P<0.01). The cases with definite etiological diagnosis accounted for 5.89%, most cases were rotavirus infections (87.91%). The years of life lost (YLL) due to infectious diarrhoea was 22.53 person-years, and the years lived with disability (YLD) was 9.42 person-years. Children aged <5 years were at high risk for infectious diarrhea with cumulative YLD of 7.21 person-years (76.54%). People aged >60 years old were also a risk group for infectious diarrhea with YLD of 0.82 person-years (8.70%).

  Conclusion  The main urban area of Jiangjin should be regarded as the key area for the prevention and control of infectious diarrhea. The relevant departments should further improve the etiological diagnosis and take targeted measures to control the incidence and spread of infectious diarrhea in children aged <5 years and children outside child care settings according to the epidemilogic and etilogic characterisrics of infectious diarrhea.