Abstract:

Objective To analyze the epidemiological characteristics of other infectious diarrhea in Zigong City for scientific evidence to formulate corresponding prevention and control measures. Methods The data on other infectious diarrhea in Zigong City was retrieved through Infectious Disease Surveillance System under the Chinese Disease Prevention and Control Information System, and analyzed by using descriptive epidemiological methods. Results A total of 13 628 cases of other infectious diarrhea were reported in Zigong City from 2015 to 2022, with an average incidence of 62.97/100 000 and an annual incidence of 43.77/100 000-94.62/100 000. The incidence showing an increasing trend from 2015 to 2022 (Z=2.35，P<0.05). There were 2 waves for the reported cases, which peaked in spring and sub-peaked in summer. Children aged from 0 to 2 years were dominant in the reported cases, accounting for 63.84% (8 700/13 628) of the total reported cases. The reported cases were 7 444 for males, and 6 184 for females, with an average reported incidence of 69.37/100 000 and 56.69/100 000, and the incidence was higher in males than in females. The pathogen was clearly identified in 22.36% (3 047/13 628) of all reported cases, in which 95.31% (2 904/3 047) were associated with viral infection. Rotavirus was most seen, accounting for 97.35% (2 827/2 904) of the total infections. Virus infection mainly occurred in winter and spring, and bacterial infection mainly occurred in summer. A total of 7 outbreaks were reported, all of which were caused by norovirus. Conclusion Infectious diarrhea prevention and control in Zigong area should focus on children, and diverse pathogens should be monitored in different seasons. In addition, medical institutions shall further improve the level of testing for other infectious diarrhea and the standardization and sensitivity in reporting the infectious diseases.

Key words: Other infectious diarrhea, Epidemiological features, Etiological features, Zigong City