Zoonotic tick-borne diseases, including those caused by Rickettsia species, continue to have serious consequences for public health worldwide. One such disease that has emerged as a major problem in several countries of the American continent is the Rocky Mountain Spotted Fever (RMSF) caused by the bacterium Rickettsia rickettsii. Several tick species are capable of transmitting R. rickettsia, including Amblyomma cajennense, A. aureolatum, A. imitator, Rhipicephalus sanguineus, Dermacentor andersoni, D. variabilis and possibly A. americanum. Despite previous reports in Mexico linking new outbreaks of RMSF to the presence of these tick species, no robust measures have tackled transmission. In the present study, we amplified R. rickettsii from 109 test DNA samples extracted from ticks collected from several animals and humans of Tamaulipas, Mexico, between November 2015 and December 2017. Our analysis revealed the presence of R. rickettsii in six samples and these findings contribute to a spatial distribution map that is intended to minimize the risk of transmission to humans.

中文翻译：

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墨西哥-美国跨界地区采集的tick中立克次体物种的分子检测。

人畜共患的tick传疾病，包括由立克次氏菌引起的tick传疾病，继续对全世界的公共卫生产生严重影响。在美洲大陆的多个国家中，作为主要问题出现的一种疾病是由立克次氏病立克次氏菌引起的落基山斑热（RMSF）。几种tick科物种能够传播立克次氏菌，包括Amblyomma cajennense，A。aureolatum，A。imitator，Rhipicephalus sanguineus，Dermacentor andersoni，D。variabilis和可能的A. Americanum。尽管墨西哥先前有报道称新的RMSF暴发与这些壁虱物种的存在有关，但尚无强有力的措施解决传播问题。在本研究中，我们从2015年11月至2017年12月之间从从墨西哥塔毛利帕斯州的几种动物和人类采集的tick中提取的109个测试DNA样本中扩增了立克次氏菌。我们的分析显示，六个样品中都存在立克次氏菌。这些发现有助于形成一个空间分布图，旨在最大程度地减少传播给人类的风险。