For the treatment of susceptible strains of the organisms causing the following infections: Respiratory tract infections (tonsillitis, tracheobronchitis) due to Staphylococcus aureus , Streptococcus spp., Escherichia coli , and Proteus mirabilis . Genitourinary tract infections (cystitis) due to Staphylococcus aureus , Streptococcus spp., E. coli , and Proteus mirabilis . Gastrointestinal tract infections (bacterial gastroenteritis) due to Staphylococcus aureus , Streptococcus spp., E. coli , and Proteus mirabilis . Bacterial dermatitis due to Staphylococcus aureus , Streptococcus spp., and Proteus mirabilis . Soft tissue infections (abscesses, lacerations, and wounds) due to Staphylococcus aureus , Streptococcus spp., E. coli , and Proteus mirabilis . For the treatment of susceptible strains of the organisms causing the following infections: Upper respiratory tract infections due to Staphylococcus aureus , Streptococcus spp., and E. coli . Genitourinary tract infections (cystitis) due to Staphylococcus aureus , Streptococcus spp., E. coli , and Proteus mirabilis . Gastrointestinal tract infections due to E. coli . Skin and soft tissue infections (abscesses, lacerations, and wounds) due to Staphylococcus aureus , Streptococcus spp., E. coli , and Pasteurella multocida . For the treatment of baby pigs under 10 pounds for porcine colibacillosis caused by Escherichia coli susceptible to amoxicillin.