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菌在对抗抗菌药物的过程中，为了免遭伤害，形成了多种防卫机制，由此产生的耐药菌得以存活和繁殖，符合“适者生存”的生物进化规律。很多细菌对某种或多种抗菌药物具有耐药性，且具有多种耐药机制。从已有的研究来看，细菌产生钝化酶的耐药机制和发生靶位改变的耐药机制往往
In the process of fighting against antibiotics, the bacteria formed a variety of defense mechanisms in order to avoid injury, and the resulting resistant bacteria survived and multiplied, in line with the biological evolution law of “survival of the fittest.” Many bacteria are resistant to one or more antimicrobial agents and have multiple resistance mechanisms. From the existing research, bacterial resistance to produce passive enzyme mechanism and the occurrence of target changes in drug resistance mechanism often