 This study examined antibiotic use in nursing homes in the United States. It found that 54% of residents received at least one systemic antibiotic, with the most commonly prescribed being fluoroquinolines, cephalosporins, and urinary anti-infectives. The median duration of an antibiotic course was seven days, with higher facility antibiotic use rates correlating positively with higher proportions of short-stay residents, for-profit ownership, residents with low cognitive performance, and having at least one resident on a ventilator. This article was authored by Sarah Kobani, Stanley W Wang, Laura Elditz, and others.