Context

Patients are at heightened risk of Clostridium difficile-associated disease when they are exposed to both the organism and to antibiotic treatments, which deplete their normal, diverse, protective gastrointestinal flora. Both of these factors are prevalent in healthcare facilities, and thus C. difficile is the most common and most burdensome hospital-acquired pathogen.1 The hazards of antibiotic use may extend beyond the individual patient. As ward-level antibiotic use increases, so too does an individual patient’s risk of C. difficile infection, even when he or she has not directly received antibiotics.2 In this study, Freedberg et al aim to provide perhaps the most direct evidence of the indirect hazards of antibiotic use on the risk of C. difficile—by testing whether antibiotic receipt by a …