%0 Journal Article %J Annual review of medicine %D 2009 %T Extensively drug-resistant tuberculosis: a new face to an old pathogen. %A Shenoi, Sheela %A Friedland, Gerald %K Extensively Drug-Resistant Tuberculosis %K Humans %K Risk Factors %P 307-20 %R 10.3109/00952990.2011.568081 %V 60 %X The presence and consequences of resistance to drugs used for the treatment of tuberculosis have long been neglected. The recent detection and recognition of widespread multiple-drug-resistant (MDR) and extensively drug-resistant (XDR) tuberculosis have raised interest and concern among clinicians and public health authorities globally. In this article, we describe the current global status of drug-resistant tuberculosis. We discuss the development of resistance, current management, and strategies for control. %8 2009