Polymyxin

Polymyxins are cationic detergent antibiotics, with a general structure of a cyclic peptide with a long hydrophobic tail. They disrupt the structure of the bacterial cell membrane by interacting with its phospholipids. Polymyxins have a bactericidal effect on Gram-negative bacilli, especially on Pseudomonas and coliform organisms. Polymyxin antibiotics are highly neurotoxic and nephrotoxic^{[citations needed]}, and very poorly absorbed from the gastrointestinal tract. Polymyxins also have antifungal activity.

Additional recommended knowledge

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Daily Sensitivity Test

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Well known examples:

• Colistin
• Polymyxin B
• Surfactin

Polymyxin acts as an antibiotic by damaging the cytoplasmic membrane of bacteria. Also polymyxins biological source is Bacillius polymyxa.

See also

• Polysporin