[An exotic non-tropical lung disease]

We report a case of pulmonary blastomycosis in a young man recently returned from a journey in Canada. He had acute pneumonia resistant to various antibiotics. Blastomycosis is an endemic mycosis in Canada and the United States, most frequently affecting the lungs, although extrapulmonary dissemination occurs in approximately one third of cases. Diagnosis is made by identification of Blastomyces dermatidis at direct examination or in culture. The lack of precise knowledge concerning the natural habitat of this microorganism is an obstacle to effective prevention.