Analysis of the surveillance results of viral diarrhea in Yunnan from 2012 to 2015

Abstract

Objective To investigate the etiological characteristics of viral diarrhea in Yunnan province from the year 2012 to 2015. Methods Kunming children's Hospital, Puji Community Health Service Center in Wuhua district of Kunming, the second Affiliated Hospital of Kunming Medical University, the first people's Hospital of Yuxi and the Third People's Hospital of Kunming were selected to collect viral diarrhea cases from 2012 to 2015 in Yunnan Province, 2 413 cases were investigated. All the fecal specimens of the diarrhea patients were collected as well as the information such as gender, age, the number of diarrhea, the date of the disease onset and the date of the sampling, and so on. The fecal specimens were tested in order to know the viral pathogens of diarrhea. Results Diarrhea patients in Yunnan Province were mainly scattered children at the age of ≤2 years old, accounted for 68.92%(1 663/2 413) of all cases. The pathogens were mainly rotavirus and norovirus, and the detection rates were 12.31% (297/2 413) and 8.00% (193/2 413), respectively. Coinfection with both viruses existed (1.62% (39/2 413)). Adenovirus and astrovirus infections occasionally occured. In the first and the fourth quarter, diarrhea cases were 638 and 937, respectively. The highest positive detection rate was in the first quarter (25.39% (162/638)). Conclusions Viral diarrhea patients in Yunnan Province from 2012 to 2015 were mainly children at the age of ≤2 years old. The pathogens were rotavirus and norovirus. Effective measures should be taken to improve the healthy environment and to reduce the risk of infection among the scattered children. Key words: Diarrhea; Viruses; Rotavirus; human adenoviruses; Cross-sectional studies