2001 Surveillance Slides
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Primary Anti-TB Drug Resistance
United States, 1993-2001
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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. |
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Last Reviewed: 05/18/2008 Content Source: Division of Tuberculosis Elimination
National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention
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