Analysis on Surveillance Results of Hemorrhagic Fever with Renal Syndrome in 2007 in Hunan Province

Objective To study the epidemic foci,type of hemorrhagic fever with renal syndrome(HFRS),population distribution,epidemic trend,host animals and their virus-carrying situation,and to take comprehensive scientific measures to prevent and control HFRS in Hunan province.Methods According to Implementation Scheme for Hemorrhagic Fever with Renal Syndrome Surveillance in 2007 in Hunan province,epidemiological and pathogenic surveillance was conducted in nine surveillance areas(4 routine areas and 5 emergency surveillance areas around the Dongting Lake region).Direct immunofluorescence assay(DFA)was used to detect the antigen from rat lungs,which indicated that the host animals were naturally infected with HV.Results A total of 705 cases were reported in 2007,the annual incidence rate was 1.11/100 000,which increased by 24.72% than that in 2006.The total number of captured rodents was 517 in 4 routine surveillance areas,the average rodent density was 5.20%,and the virus-carrying rate of rodents was 0.39%.One Apodemus agrarius and one Mus musculus from shuangfeng county were detected with positive HV antigen.261 host rodents from 5 emergency surveillance areas were detected and the positive rate was 2.68%.Two microtus fortis from Junshan county,three Rattus losea and two Apodemus agrarius from Hanshou county were detected with positive HV antigen.Conclusion The HFRS epidemic situation was inreased than before in Hunan province.The host animals were with high virus-carrying rate,which should be paid more attention to.Comprehensive measures should be taken to prevent and control HFRS.