• Clin. Infect. Dis. · Dec 1997

    Rifampin-monoresistant tuberculosis in New York City, 1993-1994.

    • S S Munsiff, S Joseph, A Ebrahimzadeh, and T R Frieden.
    • City of New York Department of Health, New York 10007, USA.
    • Clin. Infect. Dis. 1997 Dec 1; 25 (6): 1465-7.

    AbstractAll New York City patients whose cultures yielded Mycobacterium tuberculosis with isolated resistance to rifampin in 1993 and 1994 were included in this study. Of the 96 patients, 48 (50%) had primary resistance, 32 (33%) had acquired resistance, and 16 (17%) had unclassified resistance; 66% had histories of illicit drug use, and 79% were infected with human immunodeficiency virus (HIV). The median time to emergence of resistance was 40 weeks among the 32 patients with acquired resistance. Each of the HIV-infected patients with acquired resistance (cases, n = 29) was matched to two HIV-infected patients who had disease due to fully susceptible M. tuberculosis (controls, n = 58). In multivariate analysis, factors associated with the emergence of rifampin resistance were as follows: a sputum smear positive for acid-fast bacilli, advanced immunosuppression, and nonadherence to therapy.

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