Colistin (as sulfate) is an antibiotic of the polymyxin group, which are synthesized by the aerobic spore-forming bacillus Bacillus polymyxa. It is active against a number of gram-negative microorganisms, including: Escherichia coli, Pseudomonas aeruginosa, Haemophilus spp., Klebsiella spp., Proteus spp., Salmonella spp., Pasteurella spp.
The mechanism of bactericidal action of colistin sulfate lies in its combination with bacterial lipoproteins and violation of the cell wall permeability, which leads to the loss of amino acids, inorganic ions, purine and pyrimidine bases by the bacterial cell and causes its death.
When administered orally, the veterinary product is practically not absorbed from the gastrointestinal tract and has an antimicrobial effect directly in the intestine.
Colistin sulfate is excreted from the body unchanged, mainly with feces and urine.
Coli 12-TRV, according to the degree of the exposure, belongs to low-hazard substances (hazard class 4 according to GOST 12.1.007-76).