What follows are the NHSN criteria for all healthcare-associated infections (HAIs). These criteria include those for the “Big Four” (surgical site infection (SSI), pneumonia (PNEU), bloodstream infection (BSI) and urinary tract infection (UTI)), outlined in earlier chapters of this NHSN manual, as well as criteria for other types of HAIs. Of particular importance, this chapter provides further required criteria for the specific event types that constitute organ/space SSIs (e.g. mediastinitis (MED) following coronary artery bypass graft, intra-abdominal abscess (IAB) following colon surgery, etc.).
National Healthcare Safety Network, Division of Healthcare Quality Promotion, Centers for Disease Control and Prevention