The combination of trimethoprim and sulfadiazine has synergistic action and usually bactericidal action against many Gram-positive and Gram-negative bacteria, including E. coli, Haemophilus spp., Pasteurella spp., Salmonella spp., Staphylococcus spp. and Streptococcus spp. Both compounds affect bacterial purine synthesis in a different way, as a result of which a double blockade is accomplished.
Gastrointestinal and respiratory infections caused by trimethoprim- and sulfadiazine-sensitive microorganisms, like E. coli, Haemophilus spp., Pasteurella spp., Salmonella spp., Staphylococcus spp. and Streptococcus spp. in calves, sheep, goats, swine and poultry.
Hypersensitivity to trimethoprim and/or sulfonamides.
Administration to animals with a seriously impaired renal and/or hepatic function or with blood dyscrasia.
- For meat:
Calves, sheep, goats and swine: 8 days.
Poultry: 5 days.