Epidemic Factors of Hemorrhagic Fever with Renal Syndrome in an Area in Tianjin
- VernacularTitle:天津市某区肾综合征出血热流行因素研究
- Author:
Yuchuan LU
- Publication Type:Journal Article
- Keywords:
Hemorrhagic fever with renal syndrome;
Hantavirus;
Environmeutal factors
- From:
Journal of Environment and Health
2007;0(08):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the epidemic factors of hemorrhagic fever with renal syndrome (HFRS) in an area in Tianjin in 1997—2005. Methods The descriptive statistical analysis was used to describe the status of HFRS. The Hantavirus(HV) carrier in the mice was investigated and the data of the meteorological, agricultural and population were collected. Rank sum tests were employed to analyze the epidemic of the disease. Results The epidemic of HFRS in the investigated area started from 1997 with annually increasing, the peak was seen in 2002, then it was dropping down. There were 105 cases in total with 4 cases died. The cases were found all over the district, including 11 towns and 70 villages. The cumulative incidence rate was 2.90/100 000, the mortality rate was 0.11/100 000, and the case fatality rate was 3.81%. The seasonal difference was found in this study. The incidences in April and May were highest, accounted for 44.76% of the total cases. The cases in the 30-year-old group accounted for one third of the total occurrence, the ratio of male to female was 3.57∶1. The incidence was highest in the farmers, accounted for 26.67%, in the transient population it accounted for 54.29%. There was a consistency between the index of HV carrier and the epidemic trend. A positive correction was seen between the average temperature and the disease incidence rate (rs=0.746, P=0.021), a negative correction was seen between the precipitation and the incidence rate (rs=-0.695, P=0.038) and between the crop area and the incidence rate (rs=-0.167, P=0.532). Conclusion The investigated area is the epidemic area where HFRS is caused by Seoulvirus(SEOV), the primitive host is Rattusnorvegicus. The main epidemic factors include the transient population massively moved into the area since the mid 1990s, the change of the predominant mice in this area, destruction of the habitats of the mice, the rats migration, the increase of the index of HV and the transformation project of houses and the farmland destruction.
