Slide 22. Primary MDR TB in U.S.-born vs. Foreign-born Persons, United States, 1993–2011. This graph highlights primary MDR TB in U.S.-born versus foreign-born persons. The percentage with primary MDR TB has declined among both groups since 1993, although the decline in the U.S.-born has been greater. As a result, the proportion of primary MDR TB cases in the US that are attributed to foreign-born persons increased from ap­proximately 25% in 1993 to 83% in 2011 (not shown on slide). Among the U.S.-born, the percentage with primary MDR TB remained between 0.4% and 0.7% from 1999 through 2010 and was 0.6% in 2011. The percentage among foreign-born persons has fluctuated year by year, while averaging approximately 1.5% from 1999 through 2010. In 2011, the percentage of primary MDR TB among foreign-born persons was 1.7%

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