These are generally reserved for use in emergencies and to combat hard-to-treat infections caused by other multi-resistant bacteria.

这些抗生素通常被储存起来以备在紧急情况下使用，用来治疗由其他多药耐药细菌产生的不易治愈的感染。

youdao

And resistant bacteria can make it harder to treat infections in humans.

抗药性细菌会使得治疗人类的细菌感染更加困难。

youdao

Unfortunately, these defense mechanisms have the added effect of making bacteria more resistant to antibiotics, and able to cause "harder to treat" infections.

不幸的是，这些防御性的增加使病菌对抗生素的耐药性更强，进而导致‘难治性’感染。

youdao

Long before the Vicuron deal, Zyvox, a pill to treat drug resistant infections, was one of Pfizer's fastest-growing medicines.

FORBES: The Next Antibiotic Buyout?

Seventy percent of these infections are resistant to at least one of the drugs most commonly used to treat them.

FORBES: Magazine Article