Testing (TB)

TST Can Be Used To Diagnose TB In Children With Prior BCG Vaccination

Published in TB and Outbreaks Week, September 29th, 1997

The tuberculin skin test (TST) is an important tool for diagnosing tuberculosis in children. But if children have received the Bacille Calmette-Guerin (BCG) vaccine, which is provided to an estimated 100 million children worldwide each year, they may falsely test positive for TB using TST.

To determine the usefulness of TST in an area with high BCG vaccination, U.S. Centers for Disease Control and Prevention (CDC) researchers conducted a survey in Botswana, a country with very high rates of TB and very high BCG vaccine use: over 90 percent of children have been vaccinated ("Tuberculin Skin Test Survey in a Pediatric Population with High BCG Vaccination Coverage --...

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Source: TB and Outbreaks Week (1997-09-29)

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