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Clin Infect Dis. 1999 Jan;28(1):52-6.

A train passenger with pulmonary tuberculosis: evidence of limited transmission during travel.

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1
Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA.

Abstract

In January 1996, smear- and culture-positive tuberculosis (TB) was diagnosed for a 22-year-old black man after he had traveled on two U.S. passenger trains (29.1 hours) and a bus (5.5 hours) over 2 days. To determine if transmission had occurred, passengers and crew were notified of the potential exposure and instructed to undergo a tuberculin skin test (TST). Of the 240 persons who completed screening, 4 (2%) had a documented TST conversion (increase in induration of > or = 10 mm between successive TSTs), 11 (5%) had a single positive TST (> or = 10 mm), and 225 (94%) had a negative TST (< 10 mm). For two persons who underwent conversion, no other risk factors for a conversion were identified other than exposure to the ill passenger during train and/or bus travel. These findings support limited transmission of Mycobacterium tuberculosis from a potentially highly infectious passenger to other persons during extended train and bus travel.

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PMID:
10028071
DOI:
10.1086/515089
[Indexed for MEDLINE]
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