But in recent years, microbes have responded by developing resistance to many of the most powerful antibiotics, threatening to undermine one of modern medicine's greatest achievements. (sciencemag.org)
We immediately began a 3 week course of powerful antibiotics designed to kill the bacteria. (macvetva.com)
Dangerous resistant bacteria tend to develop spontaneously in the bodies of patients being given powerful antibiotics for long periods, and virtually never by accident in the laboratory or in the field. (faith.org.uk)