Sulfadimidine base is a broad spectrum bacteriostasis, the aminobenzoic acid (PABA), can compete with PABA in the bacterial body of folic acid synthesis enzyme, which prevent the process of folic acid, reduce the amount of metabolic active tetrahydrofolic acid, and the latter is the bacterial synthesis of purine, thymine nucleoside and deoxyribonucleic acid (DNA) essential substances. Therefore, sulfadimethazine can inhibit the growth and reproduction of bacteria.
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