title: Babesia microti and Borrelia bissettii transmission by Ixodes spinipalpis ticks among prairie voles, Microtus ochrogaster, in Colorado.
abstract: An endemic transmission cycle of Babesia microti was discovered in Colorado in the foothills of the Rocky Mountains. B. microti were found by PCR in 4 of 25 Ixodes spinipalpis tick pools tested (a 3.2 % minimum infection rate) and in 87% (13 of 15) of Microtus ochrogaster (the prairie vole) spleen and blood samples. Using naturally infected I. spinipalpis collected from wild-caught M. ochrogaster as vectors, B. microti and Borrelia bissettii were successfully transmitted to laboratory-born M. ochrogaster. Neither I. spinipalpis, nor M. ochrogaster (the prairie vole) have been previously reported as a vector or a reservoir host of B. microti. Unlike the east coast of the United States where Peromyscus leucopus is an important reservoir for B. microti, evidence for Peromyscus spp. (neither P. maniculatus nor P. difficilis) as B. microti reservoirs was not found in this study.
authors.affiliation: Centers for Disease Control and Prevention, Division of Vector-Borne Infectious Diseases, Fort Collins, Colorado 80522-2087, USA.
authors.forename: T R
authors.initials: TR
authors.lastname: Burkot
authors.forename: B S
authors.initials: BS
authors.lastname: Schneider
authors.forename: N J
authors.initials: NJ
authors.lastname: Pieniazek
authors.forename: C M
authors.initials: CM
authors.lastname: Happ
authors.forename: J S
authors.initials: JS
authors.lastname: Rutherford
authors.forename: S B
authors.initials: SB
authors.lastname: Slemenda
authors.forename: E
authors.initials: E
authors.lastname: Hoffmeister
authors.forename: G O
authors.initials: GO
authors.lastname: Maupin
authors.forename: N S
authors.initials: NS
authors.lastname: Zeidner
mesh_terms: D000818:Animals; D001096:Arachnid Vectors / Q000469:parasitology*; D003411:Arvicolinae / Q000469:parasitology*; D001403:Babesia / Q000502:physiology*; D001404:Babesiosis / Q000662:veterinary*; D001898:Borrelia / Q000502:physiology*; D001899:Borrelia Infections / Q000635:transmission / Q000662:veterinary*; D003120:Colorado; D016054:DNA, Protozoan / Q000737:chemistry; D004197:Disease Reservoirs; D005260:Female; D018884:Ixodes / Q000469:parasitology*; D008297:Male; D051379:Mice; D016133:Polymerase Chain Reaction / Q000662:veterinary; D051381:Rats
chemical_list: D016054:DNA, Protozoan