Has antibiotic activity against several equine uterine pathogens; S.zooepidemicus, E.coli and P.aeruginosa. Highly efficient against S.zoopedemicus. Not active against K.pneumoniae. Selectively inactivates microbial serine proteases (subtilisin A and proteinase K) without inhibiting mammalian serine proteases (human neutrophil elastase, human cathepsin G and bovine pancreatic trypsin).