关键词: 恙虫病, 秋冬型, 自然疫源地, 流行病学

Abstract: This paper reported that cases of tsutsugamushi disease was firstly found in the eastern suburbs of Jinan in October 1988,and has spread to 7 village communities ever since.The results showed that epidemical characterization differed greatly from those in southern regions.The major findings were as follows:Prevalence of tsutsugamushi disease belonged to the autumnwinter type;The main reservoir of infection were Apodemus agrarius;The transmitting vector was Leptotrombidium(L) scutellare;The pathogen of tsutsugamushi disease of the autumnwinter type belonged to lowvirulent strain,and inoculated mice could not regularly die from the infection;Rickettsia tsutsugamushi could be detected on tissular smears in 3 groups of mice inoculated with suspension of internal organs of mice,and specific antibodies could be detected in the sera;Serological typing of their sera showed that they belonged to the Gilliam type;Natural foci in Jinan could be divided into hilly land type.