A normal bacteria measures one to five micrometers long.

正常的细菌有1到5微米长。

But a new study finds that just a few resistant mutants can protect large numbers of normal bacteria that would have been thought to be susceptible to the drug therapy. The research appears in the journal Nature.

但是一项新的研究发现，仅有几种基因突变可以保护大部分普通的细菌，使其对药物治疗免疫。这项研究发表在《自然》杂志上。