A nursing assistant cares for older adults on a unit with recent diarrhea illness and wound infections, handles bedpans, linens, and catheters, and must prevent spread between rooms. The nurse mentions C. difficile, MRSA, and CAUTI during huddle. Which infection prevention action best interrupts the chain of infection for common HAIs?

The correct action integrates three linked defenses required here: correct hand hygiene removes organisms and, with soap and water when C. difficile is suspected, removes spores that alcohol does not kill, contact precautions contain MRSA and C. difficile from wounds, stool, bedpans and linens through gowns, gloves and dedicated equipment changed between rooms, and catheter care prevents CAUTI through closed drainage, securement and perineal hygiene, together breaking reservoir and transmission links. Relying on alcohol sanitizer with standard precautions is strong routine practice but fails for spore transmission because alcohol does not inactivate C. difficile spores and standard precautions lack the gown and equipment dedication needed for diarrhea and wound pathogens. Soap-and-water washing with glove changes is excellent for spore removal but fails as a complete strategy because it omits environmental containment and the catheter bundle that prevents organism ascent. Maintaining contact precautions with proper catheter technique addresses barrier risks well but fails at the foundation because without correctly timed hand hygiene before and after contact, hands and equipment still transfer organisms between vulnerable older adults. For exams, remember soap and water as the exception when C. difficile or visible soiling is mentioned. As a practical check, verify hand hygiene at all five moments, change gowns and gloves between rooms, and keep bags off the floor, below bladder level and kink-free.