alexa Pulmonary cryptococcosis in patients without HIV infection.
Microbiology

Microbiology

Virology & Mycology

Author(s): Aberg JA, Mundy LM, Powderly WG

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Abstract PURPOSE: To further elucidate the diagnostic and therapeutic approaches to patients with pulmonary cryptococcosis who are not HIV-infected. SUBJECTS: All of the patients without HIV infection who received care at two Midwest hospitals between January 1986 and February 1996 and had a respiratory isolate of Cryptococcus neoformans. METHODS: The medical records of the study patients were reviewed for demographic data, host immune status, respiratory symptoms, diagnostic studies, treatment, and follow-up. RESULTS: Forty-two patient presentations comprised the overall study group. Thirty-six patients (85.7\%) had no evidence of dissemination, and six patients (14.3\%) had disseminated disease. Seven of the 36 patient presentations were definitive pulmonary cryptococcosis, 15 were presumptive disease, and 14 were colonization with C neoformans. Neither the baseline demographic parameters nor the immune status appeared to discriminate the patients with disease from the patients with colonization. A serum cryptococcal antigen (sCRAG) was positive for 7 of 18 patients, 3 of whom were proven by culture to have a disseminated infection. A negative sCRAG was observed in 11 patients, one of whom had proven dissemination. Fifteen patients underwent a lumbar puncture as part of their evaluation, and cryptococcal meningitis was diagnosed in three of these patients, all of whom had positive blood cultures for C neoformans. The majority of the patients did not receive antifungal therapy. CONCLUSION: In the majority of the patients, the lung appeared to be the sole organ involved, and a workup for systemic infection was rarely helpful. A positive sCRAG was not specific for dissemination. Antifungal therapy should be reserved for symptomatic patients, for patients with a positive sCRAG, and for patients with underlying immunosuppression.
This article was published in Chest and referenced in Virology & Mycology

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