Increasing Drug Resistance in Extensively Drug-Resistant Tuberculosis, South Africa
Emerging Infectious Diseases, Volume 17, No. 3, Year 2011
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We expanded second-line tuberculosis (TB) drug susceptibility testing for extensively drug-resistant Mycobacterium tuberculosis isolates from South Africa. Of 19 patients with extensively drug-resistant TB identifi ed during February 2008-April 2009, 13 (68%) had isolates resistant to all 8 drugs tested. This resistance leaves no effective treatment with available drugs in South Africa.