Analysis on epidemiologic characteristic of infectious diarrhea in Guangzhou,2005-2008

Objective To analyze epidemiologic characteristics of infectious diarrhea and to provide basis for control measures in Guangzhou.Methods Descriptive epidemiologic method was applied to analyze characteristics of reported infectious diarrhea cases derived from routine infectious disease surveillance system during 2005-2008.Results Totally 55 081 infectious diarrhea cases were reported during 2005-2008. The annual incidence was from 108.83/100 000-152.78 /100 000 with ascending trend. The cases below 5 years age accounted for 64.49% of the total. The incidence peak was in October and December. The top 5 districts of incidence in Guangzhou were Nansha,Huangpu,Huadu,Yuexiu and Panyu. The number of laboratory confirmed cases accounted for 16.0% of all cases. Rotavirus,enteric adenovirus and combined infections accounted for 75.49%,10.83% and 13.49% of laboratory confirmed cases,respectively. Seven outbreaks of infectious diarrhea were reported,six of which were caused by norovirus.Conclusion The infectious diarrhea was clustered in 0-5 years old children,and peaked in autumn and winter seasons. Rotavirus was the major pathogen. There was combined infection of rotavirus and enteric adenovirus. One of the effective measures of control of infectious diarrhea was to reduce the rotavirus infection.