临床上应用抗生素 ,应严格按照适应证 ,进行合理、有效地选择。依据患者的年龄、身体状况、临床诊断和病原学的药敏试验 ,及药物的抗菌作用和不良反应而做出决定。使抗感染治疗获最佳疗效。但由于抗生素长期广泛的使用 ,使患者机体防御屏障的正常菌群也遭到抑制和杀灭 ,从而增 Clinical application of antibiotics, should be strictly in accordance with indications, a reasonable and effective choice. Based on the patient’s age, physical condition, clinical diagnosis and etiology of drug susceptibility testing, and drug antibacterial effects and adverse reactions to make a decision. Anti-infective treatment to be the best effect. However, due to the long-term widespread use of antibiotics, the normal flora of the patient’s defense barrier is also inhibited and killed, thereby increasing