A new study suggests seniors who spend time in a hospital may leave with more germs than they had before entering. In their research, published in a JAMA Internal Medicine research letter, University of Michigan researchers found one in four seniors are discharged from the hospital with at least one superbug on their hands. The study also found that seniors who go to a nursing home or other post-acute care (PAC) facility tend to continue acquiring new superbugs during their stay. The data focused on those who have been admitted to a hospital recently for a medical or surgical issue, and needed extra medical care before returning home.