The incidence of new cases of tuberculosis in the U.S. dropped to 3.4 per 100,000 population in 2011, the lowest rate in over 50 years of national reporting, according to an MMWR article. The proportion with multidrug-resistant disease remained unchanged from the 2009 rate of 1.3%.
Among TB patients with a known HIV serostatus, 7.9% were coinfected.
The number of cases among foreign-born persons exceeded that among the U.S.-born, as it has every year since 2001. And for the first time Asians surpassed Hispanics as the largest ethnic group among people with TB.
Nationally, incidence rates ranged from a low of 0.7 in Maine to 9.3 in Alaska. Four states accounted for half the cases: California, Florida, New York, and Texas.