What are the four major Health Care-Associated Infections (HAIs)?

• A. CLABSIs, CAUTIs, SSIs, and VAP
• B. MRSA, C. diff, VRE, and TB
• C. CLABSI, CAUTI, SSIs, UTIs
• D. Bloodstream infections, urinary tract infections, surgical site infections, ventilator-associated pneumonia

Answer: (A)

The main idea is identifying the four infections most commonly tracked for health care quality and patient safety: central line–associated bloodstream infections, catheter-associated urinary tract infections, surgical site infections, and ventilator-associated pneumonia. CLABSI occur when a bloodstream infection is linked to a central venous catheter; CAUTI arises from indwelling urinary catheters; SSIs are infections at a surgical incision site; and VAP is pneumonia that develops in patients on mechanical ventilation. These four are prioritized because they are frequent, costly, and strongly tied to how devices are used and cared for, so surveillance and prevention focus on catheter management, sterile technique, timely removal of lines, and ventilator care. The other options either list pathogens rather than infection types, or use broad or non-specific infection categories that don’t pinpoint the standard four tracked HAIs.