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Table 8. Resistance to Isoniazid with or without Rifampin Resistance in Reported TB Cases with No Previous TB by Origin: United States, 1993-2001

Year	Resistant to Isoniazid¹						Resistant to Isoniazid and Rifampin¹
	Total Cases²		U.S.-born		Foreign-born³		Total Cases²		U.S.-born		Foreign-born³
	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%
1993	1,401	8.4	805	6.8	579	12.4	410	2.5	302	2.6	105	2.3
1994	1,355	8.3	709	6.4	632	12.1	352	2.2	238	2.2	109	2.1
1995	1,171	7.3	554	5.4	616	11.0	252	1.6	168	1.6	84	1.5
1996	1,137	7.4	495	5.2	639	11.3	206	1.3	104	1.1	101	1.8
1997	1,080	7.5	436	5.0	639	11.2	155	1.1	76	0.9	79	1.4
1998	1,011	7.5	366	4.7	643	11.3	130	1.0	55	0.7	74	1.3
1999	904	7.1	284	4.0	618	11.0	128	1.0	39	0.6	89	1.6
2000	881	7.5	267	4.3	611	11.0	118	1.0	37	0.6	81	1.5
2001	781	7.1	238	4.5	532	9.6	114	1.0	32	0.6	78	1.4
¹Isolates may be resistant to other drugs. ²Includes persons of unknown country of birth. ³Includes persons born outside the United States, American Samoa, the Federated States of Micronesia, Guam, the Republic of the Marshall Islands, Midway Island, the Commonwealth of the Northern Mariana Islands, Puerto Rico, the Republic of Palau, U.S. Minor Outlying Islands, U.S. Miscellaneous Pacific Islands, and the U.S. Virgin Islands. Note: Data for all years updated through April 10, 2002. More than 85% of all cases in each group had drug susceptibility test results reported for an initial isolate. See Surveillance Slides #18, #19, #20, and #21.

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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