Treatment of bacterial infections caused by penicillin, and dihydrostreptomycin sensitive organism Pneumonia, pasteurellosis, enteritis, mastitis, endometritis, swine erysipelas, septicemia leptospirosis, and secondary infection of Canine Distemper Procaine penicillin G is a potent antibacterial agent which is effective against a variety of pathogenic organisms, chiefly in the gram-positive category Procaine penicillin G is recommended for the treatment of bacterial pneumonia(shipping fever) caused by Pasteurella multocida in cattle and sheep, erysipelas caused by Erysipelothrix insidiosa in swine, and strangles caused by Streptococcus equi in horses