山东沂蒙山区恙虫病流行病学研究

An Epidemiological Study on Tsutsugamushi Disease in Yimeng Mountain Area,Shandong Province

沂蒙山区１９８６年首次发生恙虫病，疫区扩散迅速，以小盾纤恙螨为媒介、黑线姬鼠为宿主，属温暖带山地落叶林草丛疫源地；病原体为Ｃｉｌｌｉａｍ血清型，为秋冬型，流行曲线与小盾纤恙螨季节消长相吻合；青壮年男性农民多发，男女之比为２．３：１：病例只聚集性分布，临床症状典型，均有野外生产活动史。

The Yimeng mountain area was occured tsutsugamushi disease for the first time,and the plague area spread rapidly.The vector was Leptotrombidium scutellare.The hosts were Apodemus agraius Rattus confuncianus and fulvescens.Such a focus belonged to inland-mountain type. Pathogen was serum type of Gilliam;There was a type of autumn harvest and winter. The epidemic curve songtine of the diseases were in conformity with the season ebb and Leptotrombidium scutellere.The male peasant of the young people or prime of life was easily infected.The sex ratio (males to females) was 2.3:1.The cases showed cladistical distribution,the clinical Symptoms of most patients were typical,and the patients have history of produce-activity on field.