[Preliminary study on epidemic hemorrhagic fever (EHF) in Guizhou Province]

During 1962-1986, EHF cases have been reported in 50 out of 82 counties in Guizhou province. It was high in northern Guizhou province. However, serological survey of the population showed that endemic area extended to 51 counties. The inapparent infection rate ranged from 0 to 4.04%. In 76 out of 82 counties the rodents were found to carry hantavirus. Apodemus agrarius of Zunyi county of Guizhou and Rattus norvegicus of the eastern and south Guizhou are important reservoirs of EHF. Hantavirus has been isolated both from patients and from rodents.