Enlarge ImageBreathtaking discovery? TB hospitals like this one in Guatemala increasingly see patients with drug-resistant strains and badly need new options. Credit: Malcolm Linton Thanks to a barroom conversation, researchers may have stumbled on a powerful drug combination to battle antibiotic-resistant tuberculosis (TB), a growing threat throughout the world. New work suggests that meropenem and clavulanate, both of which are approved by the U.S. Food and Drug Administration to fight bacterial infections, tame some of the most virulent TB strains. An increasing number of people have multidrug-resistant (MDR) strains of Mycobacterium tuberculosis, which causes tuberculosis. Last year, the World...