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2001 Surveillance Slides

Primary Anti-TB Drug Resistance
United States, 1993-2001

Tuberculosis in the United States
Slide 18: Primary Anti-TB Drug Resistance, United States, 1993-2001. Primary drug resistance is estimated for the previous 9 years. The graph starts in 1993 because this is the year in which the individual TB case reports submitted to the national surveillance system began collecting information on initial susceptibility test results (for isolates) from patients with culture-positive TB. Data were available for more than 85% of culture-positive cases for each year. Primary resistance was estimated by using data from persons with no reported prior TB episode. Resistance to at least isoniazid remained between 7 and 8%. However, resistance to at least isoniazid and rifampin known as multidrug-resistant TB (MDR TB) decreased from 2.5% in 1993 to 1% in 2001, representing an actual decrease from 410 MDR TB cases to 114 in 2001.


Released October 2008
Centers for Disease Control and Prevention
National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention
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