恙虫病是一种自然疫源性疾病,其病原体为恙虫热立克次氏体(或东方立克次氏体),原寄生在鼠类,藉幼恙螨的传播形成鼠间的感染。人若被已被感染的幼恙螨刺,亦能感染本病。本病主要行于热带、亚热带及温带的一些国家。已经证明者有亚、澳两洲,即东从新几内亚,西至缅甸、印度,南至昆士兰,北至日本和中国的广大面积上。(1),(2),(3),(4) Tsutsugamushi disease is a natural foci of disease, the pathogen is Rickettsia rickettsii (or Rickettsia orientalis), the original parasites in mice, by the spread of chigger mites to form a mouse infection. If the person has been infected with chigger mites sting, but also can infect the disease. The disease mainly in tropical, subtropical and temperate countries. It has been proven that there are many areas in Asia and Australia, ie East New Guinea, West Myanmar, India, South Queensland and North Japan and China. (1), (2), (3), (4)