Abstract
Serologic testing for complement-fixing antibodies to Coccidioides immitis is commonly employed to assist in the diagnosis and management of this infection, but its usefulness in an HIV-coinfected population is unknown. In this study we reviewed all the mycologically or histologically proven cases of disseminated C. immitis infection after 1982. Disseminated C. immitis and proven HIV infection were present in eight patients. We performed serum complement-fixing antibody titers on all eight patients, six of whom gave positive tests, while two patients (25%) gave repeatedly negative results despite widely disseminated disease. We conclude that histopathology and culture remain the most reliable methods for the diagnosis of disseminated coccidioidomycosis in the HIV-infected host.
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