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1998 Surveillance Slides

Primary Isoniazid Resistance Among TB Cases
United States, 1993 - 1998

Slide 17: Map depicting Primary Isoniazid Resistance Among TB Cases, 1993-1998.
Slide 17: Primary Isoniazid Resistance Among TB Cases, 1993-1998. During 1993 through 1998, primary isoniazid resistance (estimated by analyzing data from persons without a history of previous TB) was at least 4% in 46 states and the District of Columbia. When the level of primary isoniazid resistance in the community is at least 4%, an initial regimen of four first-line drugs is recommended. Individual patient factors (e.g., history of previous TB, birth in a country with a high prevalence of drug resistance) should also be considered when choosing the initial drug regimen for TB patients.


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