Analysis praincial on surveillance of host animals of HFRS in Hebei province

Objective By analysing the epidemic characteristics of host animals of hemorrhagic fever with renal syndrome(HFRS)in Hebei province to provide scientific evidence for its prevention and control.Methods Rat density was investigated by trap-night method and immunofluorescence technique was used to detect the pulmonary virus antigen of the rats.Results At populated area the rat density was 1.85%,and the hantavirus-carrying rate was 3.33%,the community of the rats was Rattus norvegicus,Mus musculus,little Cricetulus triton and Cricetulus triton.Rattus norvegicus had the highest hantavirus-carrying rate that was 3.35% among these rats;In open country the rat density was 1.13%,and the hantavirus carrying rate was 2.44%.The community of the rats was Rattius norvegocis.Mus,musculus,Apodemus agrarius,Cricetulus trion,Microtus forrtis,Apodemus peninsulae,little Cricetulus triton and Rattus confucianus,Apodemus agrarius had the highest hantavirus-carrying rate that was 6.67% among these rats.Rattus norvegicus distributied in different communities of the rats and different districts,and it was the dominant species.The next ones were the Mus musculus and Cricetulus triton,distributed in 9 cities,constituent ratio was at the second position.The others,including little Cricetulus triton,Apodemus agrarius and Microtus fortis,distributed in few districts.Rattus confucianus and Apodemus peninsulae were captured only in the mountain area of Chengde located in the north of Hebei province.Conclusion Rattus norvegicus was the main host amimals and infection sources in Hebei province,which takes an important role in transmitting HFRS.Therefore,we should take composite prevention and control measures aiming directly at community of the rat,to control the epidemic of HFRS.