CDC Logo Tuberculosis Information CD-ROM   Image of people
jump over main navigation bar to content area
TB Guidelines
Surveillance Reports
Slide Sets
TB-Related MMWRs and Reports
Education/Training Materials
Ordering Information


U.S. Department of Health and Human Services


This is an archived document. The links are no longer being updated.

1997 Surveillance Slides

Primary Isoniazid Resistance Among TB Cases
United States, 1993 - 1997

Slide 18: Map Showing the Primary Isoniazid Resistance Among TB Cases United States, 1993 - 1997.
Slide 18. During 1993 through 1997, 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
Division of Tuberculosis Elimination -

Please send comments/suggestions/requests to:, or to
CDC/Division of Tuberculosis Elimination
Communications, Education, and Behavioral Studies Branch
1600 Clifton Rd., NE - Mailstop E-10, Atlanta, GA 30333