关键词: 圆形分布, 流行性出血热, 褐家鼠带病毒率, 发病关系

Abstract: The prevaiaoce of EHF in domestic rodent typehave closelly associated with seasonal and periodic flucfuation of infection rate in house rodent. By means of circular distribution in statistics analysis the result from survey, which the peak of EHF prevalance in human is on 29, March, and the peak of virus carrier rate is on 8, March were found out. The latter is three weeks as early as prevalance in human population. 80 percent of the cases were affected between on 17, January and 28, Jonember the year. 80 percent of the virus carrier rodent distributed between on 25, November in the last year and on 22, June in that year. Therefore, the carrier rate and the range of its distribution in rodents were one of the major factors to impact to the peak of prevalance inn human EHF.