江苏省2007年～2009年肾综合征出血热监测结果分析

目的：了解江苏省肾综合征出血热（Hemorrhagic fever with renal syndrome,HFRS）流行特征和流行因素,为制定防制对策提供科学依据。方法：对2007年～2009年全省HFRS疫情资料进行流行病学特征分析;设立固定监测点,调查鼠密度、鼠带病毒率、带病毒鼠指数及人群抗体阳性率。结果：2007年～2009年全省报告HFRS病例739例,平均发病率为0.32/10万,且以青壮年农民发病居多。春季和秋冬季各有一发病高峰,苏北秋冬峰病例占其发病总数的70.97%,且病例数有增多的趋势,苏南春峰占其发病总数的56.36%。混合鼠密度及优势鼠种密度均呈下降趋势,混合带病毒鼠指数在0.0073～0.0207间波动,一般人群平均抗体阳性率为12.84%。结论：江苏省2007年～2009年HFRS疫情维持在较低水平,但苏北和苏南流行特征明显不同,苏北部分城市疫情有上升趋势,流行因素仍然存在。

Epidemiological surveillance on hemorrhagic fever with renal syndrome from 2007 to 2009 in Jiangsu province

Objective： This study analyzed the epidemic characters and risk factors of Hemorrhagic fever with renal syndrome, in order to provide preventive measures against the disease from 2007 to 2009 in Jiangsu province. Methods： Data on the incidence rate of HFRS was collected from the whole province. Data on the density of rats, proportion of rat s with virus, index of rats with virus and the human unapparent infection rate were collected in special areas according to the standardized protocol in the project. Results： Total 739 HFRS cases were reported in whole province from 2007 to 2009, with an average incidence of 3.2 cases per million. Young and middle--aged farmers were the main victims of these cases. Two peak seasons of affect rate were observed in spring and autumn--winter. Divided by the Yangzi River, there was an obvious difference of epidemic characteristics between northern and southern of Jiangsu province. The incidence rate of peak season occurred in autumn - winter in northern area was 70.97% on the basis of all -- year cases with a tendency of increase, while that of peak season occurred in spring in southern area was 56.36% and trend to decrease. Data on Animal reservoir demonstrated that the density of main hosts and mixed species of rats has all reduced and the index of mixed species with virus fluctuates among 0. 0073 to 0. 0207. The average human unapparent infection rate was 12. 84% in the three years. Conclusion： A low incidence rate of HFRS in Jiangsu was maintained from 2007 to 2009. However the rates in some cities were trend to increase. The risk factors still existed, suggesting that, the surveillance program needs to be carried out steadily in Jiangsu province.