Entomology and Nematology Department, University of Florida, Gainesville, FL, U.S.A.
U.S. National Tick Collection, Institute for Coastal Plain Science, Georgia Southern University, Statesboro, GA, U.S.A.
Med Vet Entomol. 2021 Jun;35(2):147-157. doi: 10.1111/mve.12479. Epub 2020 Sep 12.
The brown dog tick, Rhipicephalus sanguineus sensu lato (s.l.) Latreille (Acari: Ixodidae), is a peridomestic, cosmopolitan parasite of dogs known to vector numerous pathogens of veterinary and medical importance. Recent phylogenetic analyses separate this tick into temperate and tropical lineages. Populations of Rh. sanguineus s.l. have been reported to exhibit sodium channel target site insensitivity to permethrin and etofenprox, which is likely due to the prolonged use of pyrethroids against many pests in and around the home. In this study, populations collected in the Caribbean, Africa, Asia, Europe and North America, were tested to identify the distribution of a known resistance mechanism, pathogen-vector interactions and phylogeny in relation to latitude. Using molecular assays, populations from 29 distinct locations were simultaneously geographically typed and screened for bacterial infection by Rickettsia, Ehrlichia, Babesia and Hepatozoon species, and for the presence of a sodium channel single nucleotide polymorphism known to confer permethrin resistance. Implications of these results on Rh. sanguineus s.l. management in association with geographical distribution will be discussed.
棕狗蜱，即拉特里耳广义（s.l.）血蜱（蜱螨目：硬蜱科），是一种半寄生性、世界性的犬寄生虫，已知可传播多种具有兽医和医学重要性的病原体。最近的系统发育分析将这种蜱分为温带和热带谱系。有报道称，Rh. sanguineus s.l. 种群对氯菊酯和乙氧氟草醚的钠离子通道靶位不敏感，这可能是由于在家中和周围环境中长期使用拟除虫菊酯来防治许多害虫。在这项研究中，从加勒比地区、非洲、亚洲、欧洲和北美的采集的种群进行了测试，以确定已知抗性机制、病原体-媒介相互作用以及与纬度有关的系统发育的分布情况。利用分子检测，来自 29 个不同地点的种群同时进行了地理分型，并对莱姆病、埃立克体病、巴贝斯虫病和肝孢虫病的细菌感染情况以及已知对氯菊酯产生抗性的钠离子通道单核苷酸多态性的存在情况进行了筛查。将讨论这些结果对与地理分布相关的 Rh. sanguineus s.l. 管理的影响。
