noun
tuberculin reaction; tuberculin test
Medical term for the skin test used to detect tuberculosis infection.
ツベルクリン反応が陽性だったので、精密検査を受けた。
Since the tuberculin test was positive, I underwent a detailed examination.
BCG is the vaccine against tuberculosis, while ツベルクリン反応 is the diagnostic test for TB infection.
From German 'Tuberkulin' (tuberculin) + 反応 (reaction). The term was adopted into Japanese medical vocabulary in the early 20th century.