Colistin:
Colistin (polymyxin E) is a polymyxin antibiotic produced by certain strains of "Bacillus polymyxa" var. "colistinus". Colistin is a mixture of cyclic polypeptides colistin A and B. Colistin is effective against most Gram-negative bacilli and is used as a polypeptide antibiotic.
en.wikipedia.org
粘杆菌素:
粘杆菌素（Colistin），又名克痢霉素、多粘菌素E，是一种多粘菌素类多肽抗生素，是两种环状多肽——粘杆菌素A和B的混合物。
zh.wikipedia.org
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Colistin粘杆菌素