[A focus of thrombocytopenic purpura in East Azerbaidjan province, Iran (1974-1975) (author's transl)].

In Azerbaidjan, a rural province in the North-West of Iran, an hemorragic fever has been described, with a seasonal occurrence, mainly in July. it is characterized with the penia and thrombocytopenia. Its identification with the hemorragic fever of Crimea-Congo has been ruled out on clinical and biological arguments. In a new survey, fever appeared to be generally moderate or absent and the clinical aspect is that of a thrombocytopenic purpura. The role of a virus transmitted by tick, and a toxic etiology have been both suspected but not proved. Complementary surveys are necessary.