Department of Animal Production Epidemiology and Ecology, University of Torino, via L. Da Vinci 44, Grugliasco, Turin, Italy.
Exp Appl Acarol. 2010 Sep;52(1):93-100. doi: 10.1007/s10493-010-9339-y. Epub 2010 Feb 26.
Ixodid ticks were collected from vegetation and from humans, wild and domestic mammals in a rural area in the semi-arid Argentine Chaco in late spring 2006 to evaluate their potential role as vectors of Spotted Fever Group (SFG) rickettsiae. A total of 233 adult ticks, identified as Amblyomma parvum, Amblyomma tigrinum and Amblyomma pseudoconcolor, was examined for Rickettsia spp. We identified an SFG rickettsia of unknown pathogenicity, "Candidatus Rickettsia sp. strain Argentina", in A. parvum and A. pseudoconcolor by PCR assays targeting gltA, ompA, ompB and 17-kDa outer membrane antigen rickettsial genes. Rickettsia bellii was detected in a host-seeking male of A. tigrinum. Amblyomma parvum is widespread in the study area and is a potential threat to human health.
2006 年春末，在阿根廷半干旱查科的一个农村地区，从植被和人类、野生和家养哺乳动物身上采集了壁虱，并将其作为斑点热群（SFG）立克次体的潜在传播媒介进行评估。共检查了 233 只成年壁虱，鉴定为小钝眼蜱、黄足钝眼蜱和近似钝眼蜱，以检测 SFG 立克次体。我们通过针对 gltA、ompA、ompB 和 17-kDa 外膜抗原立克次体基因的 PCR 检测，在小钝眼蜱和近似钝眼蜱中鉴定出一种未知致病性的 SFG 立克次体，“阿根廷候选立克次氏体”。在一只黄足钝眼蜱的雄性宿主寻求者中检测到了贝氏立克次体。小钝眼蜱在研究区域广泛分布，对人类健康构成潜在威胁。
