Burden ofClostridium difficileInfection in the United States

The magnitude and scope of Clostridium difficile infection in the United States continue to evolve.In 2011, we performed active population- and laboratory-based surveillance across 10 geographic areas in the United States to identify cases of C. difficile infection (stool specimens positive for C. difficile on either toxin or molecular assay in residents ≥ 1 year of age). Cases were classified as community-associated or health care-associated....