[Epidemiologic aspects of Mediterranean boutonneuse fever in the south of Corsica].

During Summer 1984 was conducted a prospective study concerning Mediterranean Spotted Fever (a rickettsiosis due to Rickettsia conorii) in the south of Corsica. The prevalence of symptomatic and typical cases was 48 per 100,000. A seroepidemiologic study made on blood donors of the same area shows a prevalence of antibody to R. conorii at 12% for a dilution of 1/32, 4.8% for 1/64 and 2.5% for 1/128. This study show that Corsica is, as well as south of France, Sicily and Spain an endemic country for Mediterranean Spotted Fever and that asymptomatic cases are mostly frequent.