摘　　要:
    近年来，世界抗生素市场的平均年增长率为8%左右，全球抗生素的市场份额约为250～260亿美元，各大制药企业纷纷投入巨资进行抗生素药物的研发，使抗生素新品不断出现。在中国医药市场中，抗感染药物已经连续多年位居销售额第一位，年销售额为200多亿元人民币，占全国药品销售额的30%，全国6700国家药品生产企业中，有1000多家生产各类抗生素，产品竞争异常激烈。

    [Abstract]：In recent years, the average annual growth of the antibiotic market of the world is about 8%, the market share of the global antibiotic is about 25060 hundred million dollars, every large pharmacy enterprise invest the research and development that a huge sum of money carried on the antibiotic medicine one after another , make the antibiotic new product appear constantly. In the medical market of China , have resisted and infected medicines and already occupied the primary importance of the sales amount for years, annual sales amount for 20 billion more than, account for national medicines 30% of sales amount, the whole country 6700 country among the manufacturing enterprise medicines, more than 1000 produce all kinds of antibiotic, the products are unusually fierce in competition .

    [Key words]：The antibiotic , penicillin , hair spore have plain fungus , researches and develops , the market , predicts , competition

    抗生素是微生物的代谢产物，是由真菌、细菌或其他生物在繁殖过程中所产生的一类具有杀灭或抑制微生物生长的物质，也可用人工合成的方法制造，用很小的剂量就能抑制或杀灭病原微生物。自1940年青霉素应用于临床以来，抗生素的种类已达几千种，在临床上常用的亦有几百种，主要是从微生物的培养液中提取的或者用合成、半合成方法制造，有以下几种分类：