青霉素族抗菌素是一族具有如下結构的抗菌素: ■目前最常用的青霉素如苄青霉素(即青霉素G),其結构的R为苄基。它的杀菌作用强,在一般情况下几乎沒有显著的副作用,所以是一个很重要的药物。但近几年来发現了这样一个事实,那就是很多原来用苄青霉素能治好的疾病,现在田苄青霉素无效了。經过研究知道,这是因为伴随着青霉素使用的日益广泛,有些具有耐筋性的病原菌,它們的分布也 Penicillin antibiotics are a family of antibiotics that have the following structure: ■ The most commonly used penicillin, such as penicillin (ie, penicillin G), has a structure in which R is benzyl. It’s bactericidal effect, in general, almost no significant side effects, it is a very important drug. However, in recent years, the discovery of the fact that many of the original diseases that can be cured with benzyl penicillin is now null and void of benzylpenicillin. After research, this is because with the growing use of penicillin, some of the pathogenic bacteria with resistance to tendon, their distribution is also