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Pulmonary cavitation with Nocardia and Aspergillus in a renal transplant patient.

We present an autopsy case of concomitant pulmonary aspergillosis and nocardiosis undiagnosed during life in a long-term surviving renal transplant recipient. The patient had fever and a newly developed cavitary lesion on a chest x-ray. The working diagnosis was pulmonary tuberculosis with possible colonization by Aspergillus species. Cultures of bronchial washings became positive for Aspergillus fumigatus 1 day after death. The study of tissue from the lung cavity at autopsy revealed Aspergillus fumigatus (confirmed by postmortem culture) and the filaments of Nocardia species. Increased numbers of surviving immunosuppressed patients will require aggressive, comprehensive diagnostic techniques for the detection of polymicrobial infections.