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Case of tick-associated rash illness caused by Amblyomma testudinarium.

We report a case of tick-associated rash illness (TARI), a new clinical entity of erythema migrans associated with a tick bite without infection of Lyme borreliosis agent. The patient, a 53-year-old man, went hiking in a mountainous area of Minoh City, Osaka Prefecture in October 2012. An erythematous macule with itching and a biting tick was found on his left thigh 2 days later, which gradually expanded. On the first visit to our department at the fifth day after hiking, an erythematous macule of 10 cm was recognized around the bite site. He had no systemic symptoms, and laboratory data were