title: Tickborne relapsing fever - United States, 1990-2011.
abstract: Tickborne relapsing fever (TBRF) is a zoonosis caused by spirochetes of the genus Borrelia and transmitted to humans by ticks of the genus Ornithodoros. TBRF is endemic in the western United States, predominately in mountainous regions. Clinical illness is characterized by recurrent bouts of fever, headache, and malaise. Although TBRF is usually a mild illness, severe sequelae and death can occur. This report summarizes the epidemiology of 504 TBRF cases reported from 12 western states during 1990-2011. Cases occurred most commonly among males and among persons aged 10‒14 and 40‒44 years. Most reported infections occurred among nonresident visitors to areas where TBRF is endemic. Clinicians and public health practitioners need to be familiar with current epidemiology and features of TBRF to adequately diagnose and treat patients and recognize that any TBRF case might indicate an ongoing source of potential exposure that needs to be investigated and eliminated.
authors: Joseph D
authors: JD
authors: Forrester
authors: Anne M
authors: AM
authors: Kjemtrup
authors: Curtis L
authors: CL
authors: Fritz
authors: Nicola
authors: N
authors: Marsden-Haug
authors: Janell B
authors: JB
authors: Nichols
authors: Leslie A
authors: LA
authors: Tengelsen
authors: Rick
authors: R
authors: Sowadsky
authors: Emilio
authors: E
authors: DeBess
authors: Paul R
authors: PR
authors: Cieslak
authors: Joli
authors: J
authors: Weiss
authors: Nicole
authors: N
authors: Evert
authors: Paul
authors: P
authors: Ettestad
authors: Chad
authors: C
authors: Smelser
authors: Jonathan
authors: J
authors: Iralu
authors: Randall J
authors: RJ
authors: Nett
authors: Elton
authors: E
authors: Mosher
authors: JoDee Summers
authors: JS
authors: Baker
authors: Clay
authors: C
authors: Van Houten
authors: Emily
authors: E
authors: Thorp
authors: Aimee L
authors: AL
authors: Geissler
authors: Kiersten
authors: K
authors: Kugeler
authors: Paul
authors: P
authors: Mead
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000818:Animals; D001898:Borrelia / Q000302:isolation & purification*; D002648:Child; D002675:Child, Preschool; D019353:Endemic Diseases; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D026861:Ornithodoros; D012061:Relapsing Fever / Q000175:diagnosis / Q000453:epidemiology*; D014481:United States / Q000453:epidemiology; D055815:Young Adult
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