Kidney-Damage Drug Seen Attacking Spread of Superbacteria

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Doctors spurned colistin for decades because it damages kidneys. Now the drug is deemed “critically important” and in demand worldwide to thwart the most obstinate infections.

The 53-year-old medicine, also used as an additive in chicken feed, is back in favor as resistance to antibiotics escalates and doctors run out of weapons to fight conditions ranging from urinary tract infections to pneumonia.