Infection Prevention & Standard Precautions

Why Infection Control Dominates the CT CNA Exam

Infection prevention sits inside the Basic Nursing Skills topic, which is about 39% of the Physical Care Skills domain (and Physical Care Skills is ~61% of the whole written test). It is also the only area guaranteed to appear on the clinical skills test, because Hand Hygiene is the one skill Prometric administers to every Connecticut candidate.

Healthcare-associated infection (HAI) means an infection a resident acquires while receiving care that they did not have on admission. CNAs are the front line against HAIs because they have the most physical contact with residents.

The Chain of Infection

Infection spreads through a six-link chain of infection. Breaking any one link stops the spread:

• Causative agent — the pathogen (bacteria, virus, fungus).
• Reservoir — where it lives (a person, water, equipment).
• Portal of exit — how it leaves (cough, wound drainage, stool).
• Mode of transmission — how it travels (contact, droplet, airborne).
• Portal of entry — how it gets in (broken skin, mouth, eyes).
• Susceptible host — the next person (often an elderly, immune-weak resident).

Hand hygiene and PPE break the mode of transmission link — the easiest link for a CNA to control.

Hand Hygiene: The #1 Tested Skill

Hand hygiene means cleaning hands to remove pathogens. There are two methods:

Why soap and water for C. diff and Norovirus: alcohol gel does not kill Clostridioides difficile spores or Norovirus. The physical friction and rinsing of soap and water washes spores away. This is a classic exam trap — the "convenient" answer (sanitizer) is wrong.

When to perform hand hygiene: before and after every resident contact, before applying gloves, after removing gloves, after touching contaminated surfaces, and after using the restroom. Remember: gloves are not a substitute for handwashing.

Worked Skills-Test Sequence

1. Turn on water, wet hands and wrists, keeping fingertips pointed down.
2. Apply soap; lather all surfaces — palms, backs, between fingers, fingertips, thumbs — for 20+ seconds.
3. Rinse from clean (wrist) to dirty (fingertips), fingertips down.
4. Dry with a clean paper towel.
5. Use a dry paper towel to turn off the faucet so you do not re-contaminate clean hands.

Dropping a paper towel into the sink, touching the faucet with bare hands, or under-timing the wash are the most common fail points on the Prometric checklist.

Standard Precautions vs. Transmission-Based Precautions

Standard Precautions apply to every resident, every time, regardless of diagnosis. You treat all blood, body fluids, secretions, and excretions (except sweat), non-intact skin, and mucous membranes as potentially infectious. This includes hand hygiene, gloves, and gowns/masks when splashes are likely.

Transmission-Based Precautions are added on top of Standard Precautions when a specific pathogen is known or suspected:

Common exam trap: TB requires an N95 fitted respirator, not a plain surgical mask, and a negative-pressure room with the door kept closed. A surgical mask is correct for influenza (droplet), not TB.

Putting On and Taking Off PPE

Personal protective equipment (PPE) is gear that blocks pathogens: gloves, gown, mask/respirator, and goggles/face shield.

Donning (putting on) order: gown → mask/respirator → goggles → gloves.

Doffing (removing) order: gloves → hand hygiene → goggles → gown → mask → hand hygiene. Gloves come off first because they are the most contaminated item, and you finish with hand hygiene.

Other high-yield rules: dispose of uncapped sharps directly into a puncture-resistant container (never recap a needle); handle soiled linen by rolling the dirty side inward and never shaking it; and clean blood spills with a 1:10 bleach dilution or EPA-registered disinfectant while gloved.

Medical Asepsis and Clean-to-Dirty

Medical asepsis (clean technique) means reducing the number and spread of pathogens. Surgical asepsis (sterile technique) means destroying ALL microorganisms — that is a nurse-level skill, not a CNA task. The principle CNAs apply constantly is clean-to-dirty: always work from the cleanest area toward the most contaminated.

This is why a bed bath proceeds face → arms → chest → abdomen → legs → back → perineal area, and why perineal care for a female resident wipes front to back with a fresh cloth surface per stroke. Moving dirty-to-clean is cross-contamination — carrying microorganisms from a soiled item to a clean one, as when a CNA touches soiled linen then a clean bedrail before hand hygiene.

Hold clean linen away from your uniform (your uniform is dirty), carry soiled linen away from your body to the hamper, and clean shared equipment between residents.

Signs of Infection to Report

CNAs do not diagnose, but they catch early infection. Report to the nurse immediately any of these, because early detection prevents an outbreak:

• Fever, chills, or a temperature above the resident's baseline.
• Redness, warmth, swelling, or purulent (pus) drainage from a wound or IV site.
• Cloudy, foul-smelling urine or new burning with urination (possible UTI).
• Diarrhea, vomiting, or new confusion (often the first infection sign in elders).

Reporting promptly lets the nurse start precautions before the pathogen spreads — exactly the teamwork the Role of the Nurse Aide domain rewards.