gramicidin :

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  • n  an antibiotic produced by a soil bacterium; used chiefly as an antiseptic in treating local infections produced by Gram-positive bacteria

  • Gramicidin is not a mold extract, but is produced by bacteria.
  • In spite of such failings, gramicidin touched off a chain reaction.
  • The TB culture may or may not be his greatest achievement: his discovery (in 1937) of gramicidin, first of the germ-killing mold extracts, led to the development of penicillin.

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