Objective  To understand the etiological and epidemiological characteristics of common viral infectious diarrhea in Guangming district of Shenzhen and provide reference data for the development and implementation of viral infectious diarrhea prevention strategy.

  Methods  From January 2018 to December 2021, the clinical data and stool samples were collected from 450 cases of viral infectious diarrhea and detections of enteric adenovirus, rotavirus, norovirus GⅠ, GⅡ, astrovirus and Sapovirus were conducted. The spread characteristics of the viruses were analyzed.

  Results  In 450 cases of viral infectious diarrhea, the 178 strains of the viruses mentioned above were detected in 150 cases (33.3%), and two or more viruses were detected in 27 cases (18.0%). The detection rate of norovirus was 18.0% (81/450) and the detection rate of rotavirus was 9.8% (44/450), which were significantly higher than those of Sapovirus (4.4%), enteric adenovirus (3.8%) and astrovirus (3.6%), the differences were significant (P<0.05). Norovirus and rotavirus were the main viruses causing viral infectious diarrhea in Guangming district. The age-specific incidence of the infections showed two peaks, one was in age group 0−5 years and another one was in age group 16−45 years. Up to 81.0% (17/21) of co-infections occurred in age group 11−45 years. For seasonal distribution, norovirus GⅡ infections mainly occurred in the first and fourth quarters, and rotavirus infections mainly occurred in the first quarter. There was a positive correlation between the symptom score of diarrhea patients and the positive detection rate of the virus (r=0.935, P<0.05).

  Conclusion  It is necessary to pay attention to the surveillance the 5 viruses causing infectious diarrhea. Screening should be carried out in diarrhea cases in high-risk seasons and in key populations to improve the sensitivity of sentinel surveillance.