Uses Duphapen+Strep is indicated for use in cattle, horses, sheep and pigs for the treatment of infections caused by, or associated with, organisms sensitive to penicillin and/or streptomycin including: Corynebacterium pyogenes, Erysipelothrix rhusiopathiae, Klebsiella pneumoniae, Listeria spp, Pasteurella haemolytica, Pasteurella multocida, Staphylococcus spp, Streptococcus spp, and Salmonella spp. Duphapen+Strep will therefore be effective in the treatment of infections caused by susceptible organisms including: Erysipelas, navel/joint-ill, respiratory tract infections, including pneumonia and atrophic rhinitis, listeriosis, meningitis, septicaemia, toxaemia associated with mastitis, urogenital tract infections, enteritis associated with Salmonella spp, salmonellosis and the control of secondary bacterial invaders in diseases of primary viral origin.