Journal of Tropical Diseases and Parasitology ›› 2023, Vol. 21 ›› Issue (1): 13-19.doi: 10.3969/j.issn.1672-2302.2023.01.003

• SPECIALARTICLES FOR OTHER INFECTIOUS DIARRHEA • Previous Articles     Next Articles

Epidemiological characteristics and spatiotemporal clustering of other infectious diarrhea in Chengdu City from 2011 to 2021

XU Kai1(), DAI Ying-xue1, WANG Yao1, WANG Liang1, XIAO Chong-kun2   

  1. 1. Chengdu Center for Disease Control and Prevention, Chengdu 610041, Sichuan Province, China
    2. Sichuan Center for Disease Control and Prevention
  • Received:2023-01-10 Online:2023-02-20 Published:2023-02-28

Abstract:

Objective To describe the epidemic characteristics of other infectious diarrhea in Chengdu area from 2011 to 2021, and analyze the temporal and spatial aggregation so as to provide scientific basis for prevention and control of these intestinal infectious diseases. Methods The data of other infectious diarrhea diseases reported in Chengdu area were retrieved through the Infectious Disease Surveillance System under the Chinese Disease Prevention and Control Information System from 2011 to 2021. The incidence profile and the distribution characteristics in different region, population and time were described. The spatial autocorrelation analysis and spatial and temporal scanning were used to analyze the characteristics of spatial and temporal aggregation. Results A total of 94 955 cases of other infectious diarrhea were reported with an average annual incidence of 53.46/100 000 in Chengdu area from 2011 to 2021. The annual reported incidence was 36.86/100 000-78.64/100 000, showing an overall upward trend (χ2Trend=34.13, P<0.001). The highest number of reported cases was mainly seen in summer and winter. In the reported cases, 52 125 were males, and 42 830 females, with a sex ratio being 1.22∶1. By age distribution, incidence of the infections was the highest in children under 6 years old (74.00%, 70 268/94 955). By occupational distribution, the proportion of scattered children was the largest (67.21%, 63 821/94 955). Global spatial autocorrelation analysis showed that there was spatial clustering of other infectious diarrhea during 2011 to 2019. Local spatial autocorrelation analysis found that the Hi-tech Zone, Qingyang District, Chenghua District, Wuhou District, Jinjiang District and Jinniu District were the "hot spots" of the disease, while Qionglai City, Pujiang County and Dayi County were the "cold spots". Spatial-temporal scanning analysis also shows that there is obvious spatial-temporal clustering. In addition to the Hi-tech Zone, Qingyang District, Chenghua District, Wuhou District, Jinjiang District and Jinniu District, the main cluster also involves Qingbaijiang District, Jintang County, Chongzhou City, Xinjin District, Tianfu New District and other areas. The clustering time is mostly summer and winter. Conclusion In recent years, prevalence of other infectious diarrhea in Chengdu represents an overall upward trend, and primarily peaks in summer and winter. The reported cases are mainly scattered children under 6 years old. These findings suggest that monitoring of key areas and key populations as well as health education should be strengthened during the prevalent season.

Key words: Other infectious diarrhea, Epidemic characteristics, Spatiotemporal aggregation, Chengdu City

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