磺胺类药是具有氨基苯磺酰胺基本结构的抗菌药物。本药抗菌谱较广,对多种致病菌均有抑制作用,其中以溶血性链球菌、脑膜炎双球菌、肺炎杆菌、大肠杆菌、痢疾杆菌等较为敏感。但由于磺胺药仅具有抑菌作用,抗菌作用较弱,细菌容易产生耐药性。因此,自抗生素广泛应用于临床以来,磺胺药的使用就受到了轻视和限制,医生往往用抗生素取而代之。磺胺药和抗生素比较,虽然抗菌作用相对较弱,但仍有很多 Sulfa drugs are aminobenzenesulfonamide basic structure of antibacterial drugs. The antibacterial spectrum of this drug is broad, have a inhibitory effect on a variety of pathogens, including hemolytic streptococcus, meningococcus, Klebsiella pneumoniae, Escherichia coli, Shigella flexilis and other more sensitive. However, sulfa drugs only have antibacterial activity, antibacterial effect is weak, bacteria prone to drug resistance. Therefore, since antibiotics are widely used clinically, the use of sulfa drugs has been contemptuously restricted, and doctors often use antibiotics instead. Sulfa drugs compared with antibiotics, although the antibacterial effect is relatively weak, but there are still many