| Slide 22. Primary MDR TB in U.S.-born vs. Foreign-born Persons, United States, 1993–2009. 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, although the decline in the U.S.-born has been greater. As a result, the proportion
of primary MDR TB cases reported in foreign-born persons increased from approximately 25% in 1993
to 88% in 2009 (not shown on slide). Among the U.S.-born, the percentage with primary MDR TB remained
between 0.4% and 0.7% from 1998 through 2009 and was 0.3% in 2009. The percentage among foreign-born
persons has fluctuated year by year, while averaging approximately 1.5% from 1999 through 2009.
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