4.1 Infection Control and Prevention

Why Infection Control Carries the Exam

Infection control sits inside the Basic Nursing Skills category, the single largest slice of the Virginia NNAAP written exam at about 35% of items. On the skills evaluation, Hand Hygiene (Hand Washing) is always assigned as one of your five skills, and a second skill is frequently Donning and Removing PPE. Together that means infection control can directly touch two of the five scored skills plus a large share of the written questions, so it repays mastery more than any other topic.

The exam treats infection control as a habit, not a chapter. Almost every resident-care scenario hides an infection-control checkpoint: when did you wash your hands, did you change gloves between a dirty and a clean step, did you hold soiled linen away from your uniform.

The Chain of Infection

Infection spreads through a six-link chain. Breaking any single link stops the spread, and the link a CNA most easily breaks is the mode of transmission through hand hygiene.

Hand Hygiene: the Most-Tested Behavior

Perform hand hygiene before and after every resident contact, after removing gloves, after touching anything contaminated, after using the restroom, and before handling food. On the skills evaluation the handwashing checkpoints are specific: turn on the water and wet hands, apply soap, lather and rub all surfaces with friction for at least 20 seconds, keep fingertips pointed down so dirty water runs into the sink, rinse, dry with a clean paper towel, and turn off the faucet with a clean, dry paper towel so you do not re-contaminate clean hands.

Worked trap: a candidate washes flawlessly but then turns the faucet off with a bare hand — that single bold step makes the hands dirty again and fails the skill. Alcohol-based hand rub is acceptable for routine hygiene when hands are not visibly soiled, but you must use soap and water when hands are visibly dirty or after caring for a resident with Clostridioides difficile (C. diff), whose spores are not killed by alcohol.

Standard vs Transmission-Based Precautions

Standard Precautions apply to every resident, every time, regardless of diagnosis: treat all blood, body fluids (except sweat), non-intact skin, and mucous membranes as potentially infectious. Use gloves for any anticipated contact, add a gown, mask, or eye protection when splashing is possible, and never recap needles.

Transmission-based precautions are layered on top when an organism is known or suspected:

• Contact (MRSA, C. diff, scabies): gown and gloves; dedicated equipment in the room.
• Droplet (influenza, pertussis): a surgical mask within about 3-6 feet of the resident.
• Airborne (tuberculosis, measles, chickenpox): a fitted N95 respirator and a negative-pressure private room with the door closed.

PPE Don and Doff Sequence

Order is a scored, bold element. Don (put on) so the cleanest barrier is closest to your body and gloves seal the gown cuffs last; doff (remove) so the dirtiest item leaves first without touching your skin.

The glove-removal trap is the most common PPE failure: grasp the outside of one glove at the wrist, peel it off inside-out into your gloved hand, slide a bare finger inside the second glove at the wrist, and peel it off over the first so both end up inside-out — your skin never touches a contaminated outer surface. After doffing, wash your hands. A candidate who removes gloves correctly but then forgets the final hand wash still loses the closing infection-control point.

Linen, Waste, and Everyday Traps

Hold clean and soiled linen away from your uniform, never shake linens (which aerosolizes germs), and never place linen on the floor or carry it against your body. Bag soiled linen in the room; place sharps in a puncture-proof container. Carry a bedpan covered, and clean reusable equipment after each use. When a task moves from a dirty area to a clean one (perineal care then a fresh dressing), change gloves and wash hands in between — gloves are single-task, single-resident, and never a substitute for hand washing.

The recurring written-exam trap rewards the calm, methodical answer: wash, glove, work clean to dirty, change gloves, wash again. Any option that reuses gloves between residents, skips hand hygiene after gloves, or shakes linen is wrong on its face.

Medical Asepsis vs Sterile Technique

The exam distinguishes medical asepsis (clean technique) from surgical asepsis (sterile technique). Medical asepsis reduces the number of germs and the spread of infection — hand hygiene, gloves, disinfecting surfaces, and clean-to-dirty work all belong here, and this is the level of practice a CNA uses for routine care. Sterile technique removes all microorganisms and is used for procedures like inserting a catheter or changing certain wound dressings; this is outside CNA scope and performed by the licensed nurse.

If a CNA touches or suspects a sterile field has been contaminated, the answer is to tell the nurse, not to fix it. Knowing which level applies is a common scenario distractor.

Signs of Infection to Observe and Report

Because the CNA is at the bedside most, recognizing early infection is tested. Report to the nurse any fever, chills, redness, warmth, or swelling, new or increased drainage or a foul odor from a wound or catheter, cloudy or foul urine, a new cough or congestion, or a sudden change in behavior or appetite in an older resident, where confusion may be the first sign of infection. The CNA observes and reports objectively; the nurse assesses and the provider diagnoses and treats. Prompt reporting plus consistent hand hygiene is the CNA's core contribution to infection prevention in a facility setting.