Peng Pei Y, Guo Xian G, Jin Dao C, Dong Wen G, Qian Ti J, Qin Feng, Yang Zhi H
Institute of Entomology, Guizhou University, and the Guizhou Provincial Key Laboratory for Agricultural Pest Management in Mountainous Region, Guiyang, Guizhou Province 550025, P. R. China.
Vector Laboratory, Institute of Pathogens and Vectors, Dali University, and the Yunnan Provincial Key Laboratory for Zoonosis Control and Prevention, Dali, Yunnan Province 671000, P. R. China.
J Med Entomol. 2017 Nov 7;54(6):1767-1770. doi: 10.1093/jme/tjx133.
There are several main vectors of scrub typhus in China, and Leptotrombidium rubellum Wang et Liao, 1984 is one of them, which was previously considered to be restricted to the coastal regions of Changle to Xiamen, Fujian province of east China. Ecological investigation of chigger mites in recent years demonstrated the presence of L. rubellum also in Yunnan province. Chigger mites were collected from 34 counties, in which 127,460 larval mites were collected from 14,381 small mammal hosts. A total of 277 species belonging to 26 genera and three subfamilies were identified. A total of 705/127,460 (0.55%) L. rubellum were collected from eight counties. Leptotrombidium rubellum was collected mainly at low elevations in southern Yunnan. A total of 663/705 (94.04%) of L. rubellum were collected from Rattus flavipectus (Milne-Edwards, 1871) found in outdoor habitats with relatively high infestation prevalence and mean intensity. Although it was collected from several hosts, the primary host was Rattus tanezumi. This represents a new distribution record of L. rubellum for Yunnan province.
恙虫病东方体在中国有几种主要传播媒介，1984年王敦清、廖兴汉发现的微红纤恙螨（Leptotrombidium rubellum）是其中之一，此前认为其仅分布于中国东部福建省长乐至厦门的沿海地区。近年来对恙螨的生态学调查表明，云南省也存在微红纤恙螨。从34个县采集了恙螨，从14,381只小型哺乳动物宿主身上采集了127,460只幼虫恙螨。共鉴定出26属3亚科的277个物种。从8个县采集到705只（占127,460只的0.55%）微红纤恙螨。微红纤恙螨主要在云南南部低海拔地区采集到。705只微红纤恙螨中有663只（占94.04%）采自黄胸鼠（Rattus flavipectus，Milne-Edwards，1871），该宿主在室外栖息地的感染率和平均感染强度相对较高。虽然从几种宿主身上采集到了微红纤恙螨，但其主要宿主是黄胸鼠。这代表了微红纤恙螨在云南省的新分布记录。
