Infection Prevention and Standard Precautions
This domain tests the chain of infection and the everyday decisions that break it: when to clean your hands, what personal protective equipment to wear and in what order, and which precautions a given organism requires. NCT items usually present an organism, a body fluid, or a task and ask for the correct precaution or the correct sequence.
Hand hygiene
Clean hands before patient contact, before a clean or aseptic task, after body-fluid exposure risk, after patient contact, and after touching patient surroundings. Soap and water is required when hands are visibly soiled and for spore-formers such as Clostridioides difficile and norovirus, because alcohol does not kill spores. Alcohol-based rub is otherwise preferred: apply, cover all surfaces, and rub until dry.
PPE sequence
Don in order: gown, mask or respirator, eye protection, gloves - gloves last because they are the most contaminated item. Doff in the reverse logic: gloves first, then eye protection, gown, and mask or respirator last, with hand hygiene immediately after. Perform a seal check on an N95 each time it is donned.
Precautions
Contact precautions (MRSA, C. difficile, scabies) mean gown and gloves plus dedicated equipment. Droplet precautions (influenza, pertussis, meningitis) mean a surgical mask within about three feet and a private room when possible. Airborne precautions (tuberculosis, measles, varicella) mean an N95 and a negative-pressure room with the door closed.
Worked example. A patient has watery diarrhea and is confirmed positive for C. difficile. Which action matters most? Gown and gloves on entry, equipment dedicated to that room, and hand hygiene with soap and water - not alcohol rub. The reasoning: the organism survives as a spore, alcohol-based rub does not reliably inactivate spores, and the diarrhea means contact spread is the live route.
Traps: believing gloves replace hand hygiene; doffing the mask first; alcohol rub after caring for a spore-former; skipping a seal check; transporting a patient on airborne precautions without a mask and prior arrangement.