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What is BCG (Bacillus Calmette-Guerin) vaccination?

April 26, 2017bacillus BCG calmette-guerin vaccination

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What is BCG (Bacillus Calmette-Guerin) vaccination?

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The BCG vaccine contains a living, weakened strain of Mycobacterium bovis – the TB which affects cattle. Normally it does not cause illness in humans, but it is similar enough to Mycobacterium tuberculosis to offer some protection against TB infection in children (but has very limited protective value in adults). BCG vaccinated people may produce a positive Tuberculin Skin Test (TST), even if they are not infected with TB. This is a common cause of false-positive TST results.