Global Trends in Resistance to Antituberculosis Drugs

A survey conducted by the World Health Organization and the International Union against Tuberculosis and Lung Disease in 35 geographic sites revealed that drug-resistant tuberculosis was ubiquitous. 1 , 2 That survey did not include temporal changes in the prevalence of resistance to antituberculosis drugs, since data were available for only one year from each of the sites surveyed. In some countries with high burdens of tuberculosis, such as China, India, and Russia, surveys were conducted only in one administrative unit, if at all. 3 The global survey has now been expanded to assess trends and provide a more representative estimate of the . . .