MM Park, AL Davis, NW Schluger, H Cohen and WN Rom
Department of Medicine, New York University Medical Center, New York, USA.

We analyzed the clinical and laboratory findings and outcome of 173 patients hospitalized at our institution from 1983 to 1994 with multidrug-resistant tuberculosis (MDR-TB) and evaluated outcome. The 173 patients (mean age 40 +/- 1 yr) were predominantly male (92%), African American or Hispanic (80%), and mostly undomiciled. Over half (52%) were known to be HIV-infected. HIV-positive MDR-TB patients had significantly more pulmonary and constitutional symptoms, more extrapulmonary disease, and fewer cavitary lesions on chest radiographs. Fifty-five percent of the patients in the cohort have died; mortality was significantly greater for HIV-positive than HIV- negative (72% versus 20%, p < 0.01). The median duration of survival of MDR-TB patients was 22 +/- 1 mo. Overall, extrapulmonary involvement was a risk factor for shorter survival, while a cavitary lesion on initial chest film and institution of appropriate treatment were positive predictors of survival. In HIV+ patients, only appropriate therapy was associated with prolonged survival (median of 14.1 mo). Interestingly, there was a trend toward better outcome in the first half of the decade reviewed. We conclude that although mortality from MDR-TB is high in both HIV-positive and HIV-negative patients, institution of appropriate therapy is the factor most strongly associated with a favorable outcome. Development of new diagnostic and therapeutic strategies for MDR-TB are urgently needed.

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