β-内酰胺抗生素包括青霉素和头孢菌素及它们的半合成衍生物.这是一类低毒高效的、抗革兰氏阳性和阴性、需氧和厌氧菌严重感染的重要武器.在日本或美国,头孢菌素已为临床广泛使用,我国已生产,并用于临床,主用于对其他抗生素耐药的严重感染.1.作用机制 β-lactam antibiotics, including penicillins and cephalosporins and their semi-synthetic derivatives, which is a class of low toxicity and high efficiency, against Gram-positive and negative, aerobic and anaerobic bacteria, an important weapon of serious infection in Japan Or the United States, cephalosporins have been widely used clinically, our country has produced, and used in clinical, the main use for other antibiotics resistant to serious infections .1 mechanism of action