Superbug gene detected in a second person in the U.S.

Researchers have found bacteria resistant to the antibiotic of last resort in a sample from a second patient in the United States, according to a study published Monday. The patient had surgery at a New York hospital last year, researchers said.

The news comes after researchers reported in late May that a patient in Pennsylvania carried a strain of E. coli bacteria that was resistant to colistin, the antibiotic that doctors use to treat patients who have infections that don’t respond to other drugs.