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Pronunciation: gram'i-si'din

Definition: One of a group of polypeptide antibiotics produced by Bacillus brevis that are primarily bacteriostatic in action against gram-positive cocci and bacilli. Commercial preparations contain several gramicidins known as gramicidin A, B, C, and D; gramicidin S (for Soviet) is cyclic, the others are linear.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.