ABSTRACT

This study evaluated species richness and rickettsial infection in ticks infesting non-volant small mammals in a preserved area of the Cerrado biome, located in the region of the Araguaia Valley, Midwestern Brazil. Between 2017 and 2018, 116 wild mammals (102 rodents and 14 marsupials) were captured and 75 ticks were collected and tested for rickettsial infection. Four species of ticks [(Amblyomma auricularium, Amblyomma cajennense sensu stricto (s.s.), Amblyomma coelebs, and Ornithodoros guaporensis)] were identified with new tick-host association for small mammals as follows: nymphs of A. cajennense s.s. and A. auricularium parasitizing Thrichomys pachyurus rodents. Our results expand the distributional range of O. guaporensis into the Cerrado Biome and point the occurrence of Rickettsia amblyommatis and Rickettsia bellii in A. auricularium.

摘要

这项研究评估了位于巴西中西部Araguaia谷地区Cerrado生物群落保护区的s虫在非s游的小型哺乳动物中的物种丰富度和病感染。在2017年至2018年之间，共捕获了116只野生哺乳动物（102只啮齿动物和14只有袋动物），并收集了75条s虫并进行了立克次氏菌感染测试。通过新的壁虱寄主-寄主协会，发现了四种s（[ Amblyomma auricularium，Amblyomma cajennense sensu stricto（ss），Amblyomma coelebs和Ornithodoros guaporensis ]]，如下所示：small虫的若虫和A. auricularium的若虫。拟南芥（Thrichomys pachyurus）啮齿动物。我们的研究结果扩大分布区域的O. guaporensis到塞拉多生物群落和点出现立克次体amblyommatis和立克次体bellii在A. auricularium。