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首页> 外文期刊>Zoonoses and Public Health >Rickettsial Infection in Animals, Humans and Ticks in Pauliceia, Brazil
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Rickettsial Infection in Animals, Humans and Ticks in Pauliceia, Brazil

机译：巴西波利西亚的动物，人和Ti病的立克次体感染

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A previous study in Pauliceia Municipality, south-eastern Brazil, reported 9.7% of the Amblyomma triste ticks to be infected by Rickettsia parkeri, a bacterial pathogen that causes spotted fever in humans. These A.triste ticks were shown to be associated with marsh areas, where the marsh deer Blastocerus dichotomus is a primary host for this tick species. During 2008-2009, blood serum samples were collected from 140 horses, 41 dogs, 5 opossums (Didelphis albiventris) and 26 humans in farms from Pauliceia Municipality. Ticks were collected from these animals, from vegetation and from additional wildlife in these farms. Overall, 25% (35/140) of the horses, 7.3% (3/41) of the dogs, 3.8% (1/26) of the humans and 100% (5/5) of the opossums were seroreactive (titre 64) to spotted fever group (SFG) Rickettsia spp. Multivariate statistical analysis indicated that horses that were allowed to forage in the marsh were 4.8 times more likely to be seroreactive to spotted fever group (SFG) Rickettsia spp than horses that did not forage in the marsh. In addition, horses that had been living in the farm for more than 8.5years were 2.8 times more likely to be seroreactive to SFG Rickettsia spp than horses that were living for 8.5years. Ticks collected from domestic animals or from vegetation included Amblyomma cajennense, Amblyomma coelebs, Amblyomma dubitatum, Dermacentor nitens and Rhipicephalus microplus. By PCR analyses, only one pool of A.coelebs ticks from the vegetation was shown to be infected by rickettsiae, for which DNA sequencing revealed to be Rickettsia amblyommii. Ticks (not tested by PCR) collected from wildlife encompassed A.cajennense and Amblyomma rotundatum on lizards (Tupinambis sp), and A.cajennense and A.triste on the bird Laterallus viridis. Our results indicate that the marsh area of Pauliceia offers risks of infection by SFG rickettsiae.
机译：先前在巴西东南部的Pauliceia市进行的一项研究报告说，9.7％的盲肠ste虫感染了立克次氏菌（Rickettsia parkeri），后者是一种细菌性病原体，会引起人类发烧。这些A.triste壁虱被证明与沼泽地区有关，其中沼泽鹿双歧双歧杆菌是该壁虱物种的主要寄主。在2008-2009年期间，从Pauliceia市的农场收集了140匹马，41只狗，5只负鼠（Didelphis albiventris）和26个人的血清样本。从这些动物，植被和这些农场的其他野生动植物中采集。总体而言，有25％（35/140）的马，7.3％（3/41）的狗，3.8％（1/26）的人和100％（5/5）的负鼠具有血清反应性（滴度64） ）到斑点热病组（SFG）立克次体。多变量统计分析表明，允许在沼泽中觅食的马对斑疹伤寒立克次体的血清反应活性比未在沼泽中觅食的马高4.8倍。此外，在农场中生活了8.5年以上的马对SFG立克次体spp的血清反应活性比那些生活了8.5年的马高2.8倍。从家畜或植被中采集的虫包括棉铃虫，胸膜ele虫，双足棉铃虫，ni皮虫和微小头虱。通过PCR分析，仅一株来自植物的拟南芥tick被感染立克次体，其DNA测序显示为立克次体。从野生动物中采集的虫（未经PCR检测）包括蜥蜴（Tupinambis sp）上的A.cajennense和Amblyomma rotundatum，以及鸟类“ Laterallus viridis”上的A.cajennense和A.triste。我们的结果表明，泡桐属的沼泽地区存在被SFG立克次体感染的风险。

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