Bonnet Sarah I, Paul Richard E L, Bischoff Emmanuel, Cote Martine, Le Naour Evelyne
UMR BIPAR INRA-ANSES-ENVA, Maisons-Alfort cedex, France.
Institut Pasteur, Unité de Génétique Fonctionnelle des Maladies Infectieuses, Paris, France.
PLoS Negl Trop Dis. 2017 Mar 1;11(3):e0005416. doi: 10.1371/journal.pntd.0005416. eCollection 2017 Mar.
Tick-borne rickettsiae are considered to be emerging, but data about their presence in western Europe are scarce. Ixodes ricinus ticks, the most abundant and widespread tick species in western Europe, were collected and tested for the presence of several tick-borne pathogens in western France, a region never previously explored in this context. There was a high tick abundance with a mean of 4 females, 4.5 males, and 23.3 nymphs collected per hour per collector. Out of 622 tested ticks, specific PCR amplification showed the presence of tick symbionts as well as low prevalence of Borrelia burgdorferi (0.8%), Bartonella spp. (0.17%), and Anaplasma phagocytophilum (0.09%). The most prevalent pathogen was Rickettsia helvetica (4.17%). This is the first time that this bacteria has been detected in ticks in this region, and this result raises the possibility that bacteria other than those classically implicated may be involved in rickettsial diseases in western France.
蜱传立克次体被认为是新出现的病原体，但关于它们在西欧存在情况的数据却很稀少。蓖麻硬蜱是西欧数量最多、分布最广的蜱种，我们在法国西部（此前从未在此背景下进行过探索的一个地区）采集了这种蜱，并检测了几种蜱传病原体的存在情况。蜱的数量很多，每个采集者每小时平均采集到4只雌蜱、4.5只雄蜱和23.3只若蜱。在622只检测的蜱中，特异性PCR扩增显示存在蜱共生菌，以及低流行率的伯氏疏螺旋体（0.8%）、巴尔通体属（0.17%）和嗜吞噬细胞无形体（0.09%）。最常见的病原体是瑞士立克次体（4.17%）。这是该细菌首次在该地区的蜱中被检测到，这一结果增加了这样一种可能性，即除了那些经典相关的细菌外，其他细菌可能也与法国西部的立克次体病有关。
