SULFACIN ORAL SOLUTION - SULFADIMIDINE 10 % has a broad antimicrobial spectrum on gram negative and gram positive bacteria such as: Streptococcus, Staphylococcus, Bacillus anthracis, Clostridium tetani and perfringens, E.coli, Salmonella, Pasteurella, Chlamydia, Nocardia and Protozoa like Coccidia and Toxoplasma. Some species of Pseudomonas, Leptospria and Proteus are relatively resistant to sulfadimidine.