What is Colistin sulfate

Colistin sulfate is highly effective against strains of Escherichia coli, Pseudomonas aeruginosa, Salmonella spp., Haemophilus spp., Shigella spp., Pasteurella spp., Brucella spp., Aerobacter aerogenes and Bordetella bronchiseptica. 

Gram positive bacteria are generally less sensitive, but there are some sensitive strains such as 

Staphylococcus spp., Bacillus spp., Streptococcus pyogenes and Corynebacterium spp.

Colistin sulfate is an antibiotic polypeptide which possesses activity mainly against Gram negative bacteria, and in veterinary medicine is used orally for the treatment or prevention of enteritis in production animals.