一、定义抗菌素是一种生物剂,可以下定义为:微生物在生命活动过程中产生的化学物质,在高度稀释时能抑制或者杀灭他种微生物或肿瘤细胞,临床使用时,对病原菌的毒力比人体大得多,而在血和体液中能保持它的抗菌作用。目前主要由土壤微生物经发酵法产生。少量抗菌素如氯霉素、吡咯硝素和灭胞素等亦可由化学合成法大规模生产;将 First, the definition of antibiotics is a biological agent, can be defined as: the biological activity of microorganisms in the chemical generated during the highly diluted to inhibit or kill other species of microorganisms or tumor cells, clinical use, the pathogen poison The force is much greater than the human body, while maintaining its antimicrobial effect in blood and body fluids. At present, the soil microorganisms are mainly produced by fermentation. A small amount of antibiotics such as chloramphenicol, pyrrolnitrin and monascorbate can also be mass-produced by chemical synthesis;