Antibiotic gramicidin S is derived from ?
Ans. is'a'i.e., Bacillus brevisGramicidin-s is an antibiotic effective against some Gram positive and Gram negative bacteria as well as some fungi.It is a derivative of gramicidin, produced by the Gram positive bacterium Bacillus brevis.
Bacillus brevis
Cl difficle
S epidermidis
Streptococcus bovis