Extensively drug-resistant tuberculosis: epidemiology and management challenges.

Abstract excerpt

Widespread global use of rifampin for 2 decades preceded the emergence of clinically significant multidrug-resistant tuberculosis (MDR-TB) in the early 1990s. The prevalence of MDR-TB has gradually increased such that it accounts for approximately 5% of the global case burden of disease (approximately half a million cases in 2007). Eclipsing this worrying trend is the widespread emergence of extensively...

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