C77178Level 4
Bacillus Calmette-Guerin Antigen
**Semantic type:** Immunologic Factor|Pharmacologic Substance
**Definition:** An antigen preparation derived from Bacillus Calmette-Guerin, used as a component of BCG vaccine.
**Synonyms:** - BACILLUS CALMETTE-GUERIN LIVE ANTIGEN, UNSPECIFIED SUBSTRAIN - BCG
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