Resistance to Antibiotics

From the current issue of the Economist:

"All around the world, drug-resistant infections are on the rise.  They now kill more than 700,000 people a year.  In 2014 nearly 60% of samples of Escherichia coli, a common gut bacterium, collected from patients in hospitals were strains that could not be treated with penicillins.  About 25% were resistant to one or both of two other commonly used sorts of antibiotics."