Identification of potential hosts and vectors of scrub typhus and tick-borne spotted fever group rickettsiae in eastern Taiwan
Identification of potential hosts and vectors of scrub typhus and tick-borne spotted fever group rickettsiae in eastern Taiwan
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DOI：
10.1111/j.1365-2915.2010.00941.x
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发表时间：
2011-06-01
影响因子：
1.9
通讯作者：
Wang, H. C.
中科院分区：
文献类型：
--
作者：
Kuo, C. C.;Huang, C. L.;Wang, H. C.
恙虫病和蜱传斑点热群立克次体病分别由恙螨（恙螨幼虫）和硬蜱传播。我们于2007年及2008年在台湾东部广泛采样恙螨、蜱及其小型哺乳动物宿主，以评估这些疾病媒介的暴露。黑线姬鼠（啮齿目：鼠科）是最常见的小型哺乳动物（捕获1393只，占36.1%），并且感染恙螨（110760只，占47.8%）和蜱虫（1431只，占78.1%）的比例最高。最丰富的恙螨（84.5%）和蜱（> 99%）分别为细小恙螨Vercammen-Grandjean &兰斯顿（恙螨目：恙螨科）和未成熟的血蜱扇头螨Supino（硬蜱目：硬蜱科）。免疫荧光抗体检测结果显示，对恙虫病东方体Hyashi（立克次体目：立克次体科），恙虫病的病原体（70.0%的437啮齿动物），和蜱传SFG立克次体（91.9%的418啮齿动物）的血清阳性率高。本研究为阐明O.恙虫病和蜱传立克次体。今后的研究重点应放在L. imphalum和R.以及两种媒介对人类的倾向。揭示成年蜱的主要宿主对于预防SFG立克次体感染也至关重要。
Scrub typhus and tick-borne spotted fever group (SFG) rickettsioses are transmitted by chiggers (larval trombiculid mites) and hard ticks, respectively. We assessed exposure to these disease vectors by extensively sampling both chiggers and ticks and their small mammal hosts in eastern Taiwan during 2007 and 2008. The striped field mouse Apodemus agrarius Pallas (Rodentia: Muridae) was the most common of the small mammals (36.1% of 1393 captures) and presented the highest rate of infestation with both chiggers (47.8% of 110 760) and ticks (78.1% of 1431). Leptotrombidium imphalum Vercammen-Grandjean & Langston (Trombidiformes: Trombiculidae) and immature Rhipicephalus haemaphysaloides Supino (Ixodida: Ixodidae) were the most abundant chiggers (84.5%) and ticks (> 99%) identified, respectively. Immunofluorescent antibody assay revealed high seropositive rates of rodents against Orientia tsutsugamushi Hyashi (Rickettsiales: Rickettsiaceae), the aetiological agent of scrub typhus (70.0% of 437 rodents), and tick-borne SFG rickettsiae (91.9% of 418 rodents). The current study represents a first step towards elucidating the potential hosts and vectors in the enzootic transmission of O. tsutsugamushi and tick-borne SFG rickettsiae in Taiwan. Further studies should focus on characterizing pathogens in L. imphalum and R. haemaphysaloides, as well as the proclivity of both vectors to humans. Uncovering the main hosts of adult ticks is also critical for the prevention of SFG rickettsial infections.