Surveillance and analysis on hemorrhagic fever with renal syndrome in Yunnan Province at 2010

Objective To surveillance the epidemic situation of hemorrhagic fever with renal syndrome(HFRS) among persons and animals,analyze the epidemiological characteristic of it,and provide scientific basis for prevention and control the disease.Method Collecting the data of HFRS in monitoring sites,gathering the human serum and lung tissue and serum of rodents in the surveillance counties and carrying out hantavirus antibody and antigen detection.Results 15 HFRS cases had been reported,and 1 was death and the fatality rate was 6.67%(1/15) in Yunnan in 2010.The main prevalent areas were Dali(8 cases) and Chuxiong prefectures(3 cases).10 species of 406 rodents had been captured in Luxi,Wuhua,Xiangyun.Amony them,the rodents of Rattus flavipectus and Rattus norvegicus were the dominant species in human living areas and Eothenomys miletus and Apodemus draca were the dominant species in the fields.The total hantavirus carrying rate was 8.33%(33/396) in rodents.Rattus flavipectus,Rattus norvegicus,Eothenomys miletus,Mus musculus and Craidura attenuate had infected hantavirus,with the hantavirus carrying rates were 2.02%(2/99),6.38%(3/47),22.03%(26/118),16.67%(1/6) and 50.00%(1/20),respectively.Conclusions The main prevalent areas of HFRS were in the middle and western of Yunnan,there were HFRS epidemic focuses in investigation places,and the Rattus norvegicus was the infection sources.In Luxi county,Eothenomys miletus was the main hosts of hantaan type HFRS.