Tuberculosis among foreign-born persons in the United States, 1993-1998.

Abstract
The World Health Organization estimates that one third of the world's population is infected with the causative organism of tuberculosis (TB), Mycobacterium tuberculosis; that there are 8 million new cases of active TB annually; and that nearly 2 million persons die of TB each year.1 Most infections, cases, and deaths occur in developing countries. In a number of developed countries with substantial levels of immigration, however, foreign-born persons increasingly contribute to the incidence of TB and sustain TB rates.2-4
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