Medical Dictionary
colistin
noun co·lis·tin \kə-ˈlis-tən, kō-\
Medical Definition of COLISTIN
: a polymyxin produced by a bacterium of the genus Bacillus (B. polymyxa var. colistinus) and used against some gram-negative pathogens especially of the genera Pseudomonas, Escherichia, Klebsiella, and Shigella
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