[A boy with an eschar and a rash].

An 8-year-old boy presented with a fever, headache, maculopapular rash and painful joints after a vacation in Morocco. He had an eschar on his arm. Under the presumed diagnosis of rickettsiosis he was treated with doxycycline after which his fever subsided. Serology became positive for Rickettsia conorii 2 weeks later.