Abstract: Objective To analyze the epidemiological characteristics of infectious diarrhea in Shenzhen,to provide a basis for the formulation of control measures. Methods To use descriptive statistics method to analyze the infectious diarrhea data from 2017 to 2019 collected through National Disease Surveillance System. Results 61 457 cases of infectious diarrhea were reported in Shenzhen from January 2017 to December 2019, which 48 566 (79.02%) were other infectious diarrhea, 12 326 (20.06%) were dysentery and 565 (0.92%) were typhoid fever. The average annual incidence rate was 233.58/100 000, which remained at a high level. The peak seasons of typhoid and bacillary dysentery were summer and autumn. The peak seasons of other infectious diarrhea were autumn and winter. All the districts of Shenzhen had reported infectious diarrhea and the case numbers differed a lot in different districts. The main patients with typhoid were youth at the age of 20 to 39 years;main patients with bacillary dysentery and other infectious diarrhea were children under 10 years old. The top three occupations of patients with infectious diarrhea were preschool children,worker and children in kindergarten and nursery. the main transmission mode of infectious diarrhea in Shenzhen was sporadic, while occasionally outbreak occurred. Conclusion The incidence of infectious diarrhea in Shenzhen remained high level. We should evaluate and improve the infectious diarrhea report system,and strengthen surveillance and control work for infectious diarrhea.

Key words: Infectious diarrhea, Surveillance, Epidemiological characteristics, Disease control