Etiological surveillance results of other infectious diarrhea in Zhuzhou, Hunan, 2015–2018

ObjectiveTo study the epidemiological characteristics and pathogen spectrum of other infectious diarrhea in Zhuzhou, Hunan province, from 2015 to 2018.

MethodsThe relevant information were collected from diarrhea cases diagnosed in sentinel hospitals from May 2015 to November 2018. Stool samples were collected for the detection of intestinal pathogenic bacteria and viral nucleic acid detections.

ResultsA total of 580 samples of diarrhea cases were collected and detected.Bacterial infection cases accounted for 30.17%, and the Salmonella was the major pathogen in bacterial infection, followed by Campylobacter jejuni and diarrheogenic Escherichia coli. Viral infection cases accounted for 37.07%, rotavirus A was the predominant pathogen in viral infection, followed by norovirus GⅡ. The detection rate of virus was higher than those of bacterium in all age groups. The cases were mainly children aged under 5 years old (82.59%, 479/580). The seasonality was obvious with detection peaks in autumn and winter. The main pathogen causing infectious diarrhea was Salmonella in summer. Most cases occurred in autumn were caused by norovirus, while most cases occurred in winter and spring were caused by rotavirus. The gender specific pathogen spectrums were similar. The detection rates in rural area (bacterium 31.63%, virus 41.83%) was higher than those in urban area (bacterium 29.88%, virus 36.09%).

ConclusionThe viral infection rate was higher than bacterial infection rate in other infectious diarrhea cases in Zhuzhou, while rotavirus A, Salmonella, and norovirus GⅡwere the main pathogens causing other infectious diarrhea in Zhuzhou.