关键词: 鼠疫自然疫源地, 达乌尔黄鼠, 寄生蚤, 种类, 构成, 季节消长

Abstract: Objective To understand the species,composition and seasonal fluctuation of parasitical fleas of Citellus dauricus in Hebei plague natural foci.Methods To collect fleas from living Citellus dauricus and its nest from 1971 to 2001.The rats and nests were placed in the fuming-mouse tank.The rats and fleas were fumed to death in aether or petrol,and then the fleas were collected.Every hole of Citellus dauricus was prospected three times with wrapping-flannel rubber stick for gathering parasitical fleas.Then the fleas were identified.Results 14 species of 9 genera of 3 families of parasitical fleas were recognized from Citellus dauricus.The Citellophilus tesquorum mongolicus was dominant species of the parasitical fleas,and then Frontopsylla luculenta and Neopsylla bidentatiformis.The rates of infecting fleas and the flae indices were very different each year,and without obvious regulation.But they were higher in last year of prevalent of rodent plague.The rates of infecting nest fleas was highest in July,and flea indices have a peak in May.The highest infecting flea rates and flea indices of body fleas and hole fleas were found in April and May.Conclusion It is made clear that the species,composition and seasonal fluctuation of parasitical fleas of Citellus dauricus in Hebei plague natural foci.It provide scientific basis for further studying the prevalence factors of rodent plague and plague natural foci in Hebei province.