喹诺酮类是一类新型抗菌药,它们都具有吡啶酮酸分子结构,其抗菌机制是通过抑制细菌DNA回旋酶,从而阻断DNA的复制而产生抗菌作用。目前在临床上应用的主要是在分子结构6位上以氟取代,并在7位上取代吡嗪环的一类衍生物,是抗菌性能好,研制品种多的一类。现临床应用的有氟哌酸、甲 Quinolones are a class of new antibacterial drugs that all have a pyridone acid structure. Their antibacterial mechanism is to produce antibacterial effects by inhibiting bacterial DNA gyrase and thereby blocking DNA replication. At present, it is mainly used in the molecular structure of 6 to replace fluorine, and in the 7 position to replace a class of pyrazine ring derivatives, antimicrobial performance is good, a wide range of research and development. Are the clinical application of norfloxacin, A