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跳蚤是鼠疫的传播媒介,其种群数量变动直接影响鼠间鼠疫的流行趋势。1982～1984年的5～9月,我们调查了祁连连山东段某地喜马拉雅旱獭(Malmota himalayana)寄生蚤的数量动态,经统计学处理发现,体蚤和洞干蚤指数年度变化不显著,始终维持在8.1～9.2的稳定水平上;染蚤率变化明显,1982年獭体染蚤率高达90.6％,当年流行猛烈,后两年染蚤率显著降低,流行也趋于缓和。作者认为,旱獭体蚤指数和染蚤率变动与旱獭鼠疫流行的动态有关,其数量变动,可以作为预测鼠间鼠疫流行趋势的依据之一。
Fleas are the transmission media of the plague, and their population changes directly affect the epidemic trend of plague in rats. From 1982 to 1984, from May to September, we investigated the population dynamics of parasitic fleas in Himalayan marmot (Hamster) in the eastern part of the Qilian Mountains. According to statistical analysis, the annual changes of body fleas and cave dry fleas indices were not significant Maintained at a stable level of 8.1 ~ 9.2; dye flea rate changes significantly, 1982 otter body stained flea rate as high as 90.6%, when the epidemic was fierce, the latter two years, significantly reduced rates of flea infection, the epidemic also tends to ease. The author believes that the variation of body flea index and flea infection rate of marmot is related to the dynamics of the plague prevalence in the marmot. The change of the number may be used as a basis to predict the plague epidemic in the plague.