A potent antibiotic has emerged in the battle against deadly, drug-resistant superbugs

Under a microscope, this drug-resistant superbug looks as benign as a handful of pebbles. Yet carbapenem-resistant Acinetobacter baumannii, or CRAB, is a nightmare for hospitals worldwide, as it kills roughly half of all patients who acquire it.

Identified as a top-priority pathogen by both the World Health Organization and the U.S. Centers for Disease Control and Prevention, CRAB is the most common form of a group of bacteria that are resistant to nearly all available antibiotics. Victims are typically hospitalized patients who are already sick with blood infections or pneumonia. In , the bug sickens thousands and kills hundreds