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首页> 外文期刊>Journal of Medical Entomology >Rickettsia rickettsii (Rickettsiales: Rickettsiaceae) in Amblyomma americanum (Acari: Ixodidae) from Kansas
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Rickettsia rickettsii (Rickettsiales: Rickettsiaceae) in Amblyomma americanum (Acari: Ixodidae) from Kansas

机译：来自堪萨斯州的美洲A（Acari：Ixodidae）中的立克次氏体立克次氏体（Rickettsiales：Rickettsiaceae）

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摘要

The role of lone star ticks as vectors for Rocky Mountain spotted fever (RMSF) remains poorly described. We compared the entomological inoculation rates (EIRs) for Rickettsia spp. for representative sites in Missouri and Kansas, states that frequently report RMSF each year. Hostseeking ticks were collected during 2006 and pooled tick homogenates analyzed by polymerase chain reaction to detect probable R. rickettsii, with confirmation for multiple gene targets performed on individual ticks from pools that screened positive. Of 870 adult and nymphal lone star ticks, Amblyomma americanum (L.), 0.46% contained DNA of Rickettsia rickettsii. Interestingly, two of these positive ticks were concurrently infected by R. amblyommii. More than 90% of lone star tick pools contained R. amblyommii DNA. Of 169 dog ticks that were analyzed, none were infected by R. rickettsii. The entomological inoculation rate for spotted fever group (SFG) rickettsiae within lone star ticks was an order of magnitude greater than that for dog ticks. We conclude that lone star ticks may be epidemiologically significant vectors of Rocky Mountain spotted fever and of spotted fever group rickettsiae.
机译：孤星tick虫作为落基山斑疹热（RMSF）的媒介的作用仍然很少被描述。我们比较了立克次体的昆虫接种率（EIR）。对于密苏里州和堪萨斯州的代表性站点，各州每年都经常报告RMSF。在2006年期间收集了寻求宿主的tick，并通过聚合酶链反应分析了tick的匀浆，以检测可能的立克次氏体，并确认了筛选阳性池中单个positive的多个基因靶标。在870个成年和若虫孤星tick中，美洲盲A（Amblyomma americanum（L.））中0.46％含有立克次氏体立克次体的DNA。有趣的是，这些阳性tick中有两个同时感染了蓝球菌。超过90％的孤星壁虱池中含有R. amblyommii DNA。在分析的169条狗s中，没有人感染过立克次体。孤星fever内点状发热立克次体的立克次体的昆虫接种率比狗dog大。我们得出结论，孤星tick可能是落基山斑疹热和斑疹热立克次体的流行病学重要载体。

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