Scientists race to find new medicines to battle seemingly unstoppable germs

摘要

Last April, a woman checked into a medical clinic in Pennsylvania with what appeared to be a routine infection. But doctors soon realized she had something far more serious： a strain of the Escherichia coli,or E. coli, bacterium that was resistant to colistin,one of the most powerful antibiotics. Antibiotics are medications that fight against disease- causing bacteria.