title: Rickettsia rickettsii in Rhipicephalus ticks, Mexicali, Mexico.
abstract: Circulation of a unique genetic type of Rickettsia rickettsii in ticks of the Rhipicephalus sanguineus complex was detected in Mexicali, Baja California, Mexico. The Mexican R. rickettsii differed from all isolates previously characterized from the endemic regions of Rocky Mountain spotted fever in northern, central, and southern Americas. Rhipicephalus ticks in Mexicali are genetically different from Rh. sanguineus found in the United States.
authors.affiliation: Rickettsial Zoonoses Branch, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA. MEremeeva@cdc.gov
authors.forename: Marina E
authors.initials: ME
authors.lastname: Eremeeva
authors.forename: Maria L
authors.initials: ML
authors.lastname: Zambrano
authors.forename: Luis
authors.initials: L
authors.lastname: Anaya
authors.forename: Lorenza
authors.initials: L
authors.lastname: Beati
authors.forename: Sandor E
authors.initials: SE
authors.lastname: Karpathy
authors.forename: Maria Margarida
authors.initials: MM
authors.lastname: Santos-Silva
authors.forename: Beatriz
authors.initials: B
authors.lastname: Salceda
authors.forename: Donald
authors.initials: D
authors.lastname: MacBeth
authors.forename: Hector
authors.initials: H
authors.lastname: Olguin
authors.forename: Gregory A
authors.initials: GA
authors.lastname: Dasch
authors.forename: Celia Alpuche
authors.initials: CA
authors.lastname: Aranda
mesh_terms: D000818:Animals; D004269:DNA, Bacterial / Q000235:genetics; D008800:Mexico; D010802:Phylogeny; D048494:Rhipicephalus / Q000382:microbiology*; D012284:Rickettsia rickettsii / Q000235:genetics / Q000302:isolation & purification*
chemical_list: D004269:DNA, Bacterial