In this work, we analyze data that support an epidemiological link between cases of canine monocytic ehrlichiosis (CME) by Ehrlichia canis and the presence of Rhipicephalus sanguineus sensu stricto as vector in an endemic area for this tick in Argentina. In a blood sample of a 1-year-old toy poodle with CME compatible clinical signs, which showed CME typical morulae in monocytes in Giemsa-stained blood smear, DNA of E. canis was detected by PCR. Further, DNA of E. canis was also detected in a female of R. sanguineus s.s. collected on the infected dog. Rhipicephalus sanguineus s.s. is the only member of the R. sanguineus group that prevails in the study area. The results of this study suggest that R. sanguineus s.s. may play a more important role in the transmission of E. canis than it was assumed so far. The epidemiological link between CME cases and R. sanguineus s.s. as vector in temperate areas of Argentina described in this work contrast previous studies which found that R. sanguineus sensu lato “tropical lineage” (which is absent in the study area) is competent to transmit E. canis but not R. sanguineus s.s.

在这项工作中，我们分析了支持埃里希氏犬的犬单核细胞埃希氏菌病（CME）病例与阿根廷Rickicephalus sanguineus sensu stricto作为媒介在阿根廷这种tick的流行区域中存在的流行病学联系的数据。在具有CME兼容临床症状的1岁玩具贵宾犬的血液样本中，该样本显示了Giemsa染色的血液涂片中单核细胞的CME典型桑，E的DNA 。通过PCR检测犬。此外，E的DNA 。R的雌性中也检测到犬。在感染的狗身上收集了sanguineus SS。红头蛇ss是R的唯一成员。在研究领域盛行的血红素组。这项研究的结果表明，R。血红素可能在E的传播中发挥重要作用。犬比目前设想的要大。CME病例与R的流行病学联系。蜱SS在阿根廷的温带地区矢量在这项工作中所描述的对比以前的研究从而发现[R 。蜱意义上拉托“热带血统”（这是在研究区不存在）有能力发射Ë。狗，但不是[R 。蜱SS