Figure. Prevalence of multidrug resistance (MDR) in Africa among combined tuberculosis cases. A) Data collected from the Third Global Report on Anti-tuberculosis Drug Resistance in the World of the World Health Organization (WHO) published in 2004 (40). B) Data from various recent WHO publications, peer-reviewed journal articles, and WHO’s Fourth Global Report (1). C) Formulaic estimates of Zignol et al. (11). AFRO, WHO Regional Office for Africa.