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1986年前,我国恙虫病仅知流行于浙江省及其以南地区,主要属夏季型,以地里纤恙螨为主要媒介。1986年在江苏、山东发生恙虫病流行,属秋冬型。此后,在天津、山西、河北、河南、安徽、北京发现流行,吉林、辽宁、黑龙江有病例报告。在江苏和山东,小盾纤恙螨为恙虫病疫区鼠体的优势螨种,季节消长与居民恙虫病的季节分布相一致,能自然感染、叮刺传播和经卵传递恙虫病东方体(Orientia tsutsugamushi,Ot),以上结果证明小盾纤恙螨是我国秋冬型恙虫病的主要传播媒介。山东的须纤恙螨和临淮岗纤恙螨,山西的姬鼠纤恙螨,吉林的东方纤恙螨是可疑的媒介。
Before 1986, only known endemic tsutsugamushi epidemic in Zhejiang Province and its south, mainly summer type, in the ground chigger mites as the main medium. In 1986 in Jiangsu, Shandong epidemic of tsutsugamushi, is a type of autumn and winter. Since then, there have been reported cases of epidemics in Tianjin, Shanxi, Hebei, Henan, Anhui and Beijing, Jilin, Liaoning and Heilongjiang. In Jiangsu and Shandong, the small shield mite mite is the dominant mite species in the scrub typhus, and the seasonal fluctuation is consistent with the seasonal distribution of resident scrub typhus. It can naturally infect, stings and ovo transfers to the Orientia tsutsugamushi, Ot), the above results show that small shield chigger mite is the main autumn and winter scrub typhus epidemic. Shandong smelly mite and Lin Huigang fiber chigger mites, Shanxi Apodemus chigger mites, Jilin Oriental chigger mites is a suspicious medium.