Temperate and tropical lineages of brown dog ticks in North America

摘要: Abstract Recent studies document that brown dog ticks, previously considered as Rhipicephalus sanguineus, are actually comprised of multiple taxonomic units now referred to sanguineus sensu lato ( Rs sl); two lineages sl have been described in the Americas date – tropical and temperate. To identify lineage from dogs or premises at sites United States Caribbean, we evaluated ticks n  = 191) collected several geographic locations  = 21), including Arizona, California, Florida, Hawaii, Illinois, Oklahoma, Texas States, Haiti. All were identified by morphologic examination comparison standard keys. Sequence analysis 12S rRNA mitochondrial gene fragments confirmed presence both lineages, with predominating Haiti, far southern  = 9 locations) temperate present  = 12 locations). Mixed populations not although appeared separate into distinct clades. Analysis additional tick specimens region will allow more complete understanding full extent diversity R. complex likely has important implications for disease transmission, zoonotic risk.