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2003 Surveillance Slides
Primary Anti-TB Drug Resistance
United States, 1993-2003
| Slide 19: Primary Anti-TB Drug Resistance,
United States, 1993-2003. Primary drug resistance
is shown for the previous 11 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 calculated
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 approximately 1.0% each year during 1996-2003.
Released October 2008
Centers for Disease Control and Prevention
National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention
Division of Tuberculosis Elimination - http://www.cdc.gov/tb
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