Epidemiological Characteristic Analysis of Japanese Encephalitis in China During 2004～2006

Objective To analyze the epidemiological characteristics of Japanese Encephalitis,and provide the control of the disease in China(not include HongKong, Macao,and Taiwan)during 2004-2006.Methods Adopting description epidemiological method to analyze the epidemic situation of Japanese Encephalitis from National Notifiable Diseases Registry System(NNDRS)during 2004-2006.Results The reported cases of Japanese Encephalitis increased and were higher than in 2004 and 2005;cases distributed mainly in Guizhou,Sichuan,Henan,Yunnan,Chongqing ect.during 2004～2006.Cases focus on children of 15 years old,but the proportion of ≥40 years old cases increased;it was higher than average level of the whole country.Reported incidence rate increased for each age group compared with last 2 years,and the increased extent was bigger of lower age group.The death constitution and fatality rate of ≥40 years was higher prominently than last 2 years.Conclusion The strategy for Japanese Encephalitis control and prevention was a synthesis measure by vaccines immunization,thus reduced fatality rate and deformity rate.Epidemiology and pathogeny surveillance and relative ecology research should be developed,and the reason of Japanese Encephalitis age changes of disease coming and fatality rate increasing be explored.