Background.
Multidrug‐resistant (MDR) tuberculosis (TB) has emerged as a global epidemic, with
425,000 new cases estimated to occur annually. The global human immunodeficiency virus (HIV) infection epidemic has caused explosive increases in TB incidence and may be contributing to increases in MDR‐TB prevalence.
Methods.
We reviewed published studies and available surveillance data evaluating links between HIV infection and MDR‐TB to quantify convergence of these 2 epidemics, evaluate the consequences, and determine essential steps to address these epidemics.
Results.
Institutional outbreaks of MDR‐TB have primarily affected HIV‐infected persons. Delayed diagnosis, inadequate initial treatment, and prolonged infectiousness led to extraordinary attack rates and case‐fatality rates among HIV‐infected persons. Whether this sequence occurs in communities is less clear. MDR‐TB appears not to cause infection or disease more readily than drug‐susceptible TB in HIV‐infected persons. HIV infection may lead to malabsorption of anti‐TB drugs and acquired rifamycin resistance. HIV‐infected patients with MDR‐TB have unacceptably high mortality; both antiretroviral and antimycobacterial treatment are necessary. Simultaneous treatment requires 6–10 different drugs. In HIV‐prevalent countries, TB programs struggle with increased caseloads, which increase the risk of acquired MDR‐TB. Surveillance data suggest that HIV infection and MDR‐TB may converge in several countries.
Conclusions.
Institutional outbreaks, overwhelmed public health programs, and complex clinical management issues may contribute to the convergence of the MDR‐TB and HIV infection epidemics. To forestall disastrous consequences, infection control, rapid case detection, effective treatment, and expanded program capacity are needed urgently.
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