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For internationally adopted children who come to the U.S., is retesting necessary for those whose initial tuberculin skin tests (TSTs) are negative? To find out, investigators evaluated 527 such children (mean age, 23 months); most were adopted from Russia, China, or Guatemala.
On initial testing within 2 months of arrival, 416 children (79%) had negative TSTs, and 111 children (21%) had positive TSTs (≥10 mm induration). None of the children with positive tests had evidence of active tuberculosis (TB) infection. Of 204 children with initial negative results who were retested at least 3 months after their initial tests, 191 were read within 48 to 72 hours, and 38 were positive; again, none had active TB infections. Presence of a bacille Calm…