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虽然目前已有各种广谱口服头孢菌素应用于感染性疾病,但由于这些抗生素对革蓝氏阴性杆菌的抗菌活性较弱,疗效差,限制
Although various broad-spectrum oral cephalosporins have been used in infectious diseases, the antibacterial activity of these antibiotics against gram-negative bacilli is poor and the curative effect is limited