Surveillance of Hemorrhagic Fever with Renal Syndrome in Yunnan Province,China,2008

Objective To analysis the epidemiological characteristic of hemorrhagic fever with renal syndrome(HFRS) in Yunnan Province for offering a scientific guidance for prevention and control by the surveillance for human and rodent.Methods Collecting the data of cases of HFRS in Yunnan province and collecting human sera and the lung tissue and sera of rodents in the surveillance counties and detecting the antibody and antigen of hantavirus;Results The 20 cases had been rported in Yunnan in 2008.The main prevalent areas were 4 cases in Dali and 12 cases in Chuxiong prefectures.The 19 spices of 880 rodents had been captured in Luxi,Wuhua,Xiangyun,Wenshan,Luoping,Suijiang and Zhaoyang counties.The rodents of Rattus flavipectus and Rattus norvegicus were the dominant species in human living areas and the rodents of Eothenomys miletus and Apodemus chevrieri were the dominant species in the fields.The total hantavirus-carrying rate was 3.66%(30/819) in rodents.The rodents carrying hantavirus were Rattus flavipectus,Rattus norvegicus,Eothenomys miletus,Niviventer confucianus and Suncus murinus that their hantavirus-carrying rates respectively were 3.09%(10/324)、2.45%(5/204)、10.43%(12/115)、10.00%(1/10)、and 100.00%(2/2).Conclusion The main prevalent areas were in the middle and west of Yunnan,there are the Rattus foci with the hosts of the main rodents of Rattus norvegicus and there are the Apodemus foci with the host of the main rodents of Eothenomys miletus too in Luxi surveillance areas.