Wu G
Institute of Military Medicine, Nanjing Military Command, PLA.
Zhonghua Yi Xue Za Zhi. 1992 Aug;72(8):481-3, 510.
To further elucidate the role of Leptotrombidium scutellare in transmission of epidemic hemorrhagic fever virus (EHFV), a series of studies were carried out from 1988 to 1990. EHFV was isolated from both larvae of free mites collected from the grassland of endemic areas and larvae of filial mites hatched in the laboratory. The suckling mice bitten by these larvae were infected by EHFV. Because only the larvae of chigger mite can bite vertebrate hosts and only take a full meal in its entire life cycle, the pathogen carried by it can only be originated from its parent mite via transovarial route. Thus it can be confirmed that the natural infection of EHFV in these mites is transferred via transovarial transmission. The results demonstrate that L (L.) scutellare can naturally be infected by EHFV; EHFV can be transmitted to the vertebrate host by biting of the larvae and can be transferred via transovarial transmission in mites; and therefore, L (L.) scutellare can serve as a transmitting vector of EHF.
为进一步阐明小板恙螨在流行性出血热病毒（EHFV）传播中的作用，于1988年至1990年开展了一系列研究。从疫区草原采集的游离螨幼虫以及实验室孵化的子代螨幼虫中均分离出EHFV。被这些幼虫叮咬的乳鼠感染了EHFV。由于只有恙螨幼虫能够叮咬脊椎动物宿主且在其整个生命周期中仅饱餐一次，其携带的病原体只能通过经卵传递途径从其亲代螨获得。因此，可以确认这些螨中EHFV的自然感染是通过经卵传递传播的。结果表明，小板恙螨可自然感染EHFV；EHFV可通过幼虫叮咬传播给脊椎动物宿主，并可在螨中经卵传递传播；因此，小板恙螨可作为EHF的传播媒介。
