Gramicidins work as antibiotics against gram-positive bacteria like Bacillus subtilis and Staphylococcus aureus, but not well against gram-negative ones like E. coli. [ 3 ]
Gramicidins are used in medicinal lozenges for sore throat and in topical medicines to treat infected wounds.s are often mixed with other antibiotics like tyrocidine and antiseptics. [ 4 ] s are also used in eye drops for bacterial eye infections. In drops, they are often mixed with other antibiotics like polymyxin B or neomycin. Multiple antibiotics increase efficiency against various strains of bacteria. [ 5 ] Such eye-drops are also used to treat eye infections of animals, like horses. [ 6 ]
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