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We present here a prospective study on infections following tickbites in military recruits in the province of Tyrol (Austria). 84 recruits experienced tickbites and underwent clinical and serological examination twice at four-week intervals for signs of tick borne encephalitis (TBE)-virus or Borrelia burgdorferi infections. 56 and 50 recruits could be evaluated for TBE-virus and Borrelia infection, respectively. Whereas no recruit was found with clinical or laboratory evidence of TBE-virus infection, two (4%) recruits showed an erythema chronicum migrans as primary manifestation of a Borrelia burgdorferi infection and 11 (20%) recruits had a significant increase in the titer of anti-Borrelia burgdorferi antibodies. Our results support the predominance of a subclinical course of a tick-transmitted borrelia infection in the population under observation, and shed some light on the epidemiological situation of tick-transmitted diseases in Tyrol.