Hackensack Meridian Health Jun 18 2026 A common bacterial strain that lives naturally in people's guts can cause a dangerous or deadly infection for some, especially when it becomes multidrug-resistant and causes chronic urinary-tract infections (UTIs) in elderly women. But the extent of its effect on the broader population and its prevalence in the community was not well known - until now Klebsiella pneumoniae is a growing drug-resistance problem, according to a groundbreaking new study in the