[Q fever. A familial outbreak of 5 cases].

Five cases of acute Q fever diagnosed in the same family are reported. The epidemiological and clinical features, the therapy and evolution of the infections by Coxiella burnetti are discussed. Q fever is a condition to be considered in febrile illnesses or atypical pneumonia, particularly when developing in outbreaks. It is concluded that Q fever should be considered as endemic in some areas of this country (Basque Country, Catalonia...). Finally, we think that antibiotic therapy (tetracyclines) should be given, as it can shorten the duration of the disease and prevent the development of severe chronic forms.