[Clinical manifestations of acute Q-fever]

The participation of asymptomatic infections and clinical forms of acute Q-fever were analysed, using the active epidemiological investigation of the population affected by Q-fever epidemics. Out of the total number of registered Q-fever cases, the asymptomatic infection was present in 8.36%. The occurrence of asymptomatic infection was statistically more frequent by significance in women than in men. Pulmonary form of Q-fever occurred in 65.20% of the diseased. This clinical manifestation was statistically more frequent by significance in men than in women. The difference between the morbidity rates of Q-fever in regard to sexes could be caused by both the difference in the intensity of exposure to the infection and the difference in clinical presentation and recognition of the disease.