Sanitation, Disinfection, and Infection Control for the Esthetics Exam
This domain tests the levels of microbial control, product selection and contact time, which items may be reused, hand hygiene, blood-exposure response, and storage. Connecticut inspectors and exam writers care about the process, not the label on the bottle.
The four levels
- Cleaning: detergent and water remove soil and a large share of microbes. It must come first, because organic matter inactivates disinfectants.
- Sanitation: lowers microbial counts to a safe public-health level; used for surfaces and laundry.
- Disinfection: destroys most pathogenic organisms except spores, on nonporous inanimate items; requires an EPA-registered, hospital-grade, tuberculocidal product.
- Sterilization: destroys all microbial life including spores; requires an autoclave or dry-heat sterilizer - a UV cabinet does not qualify.
Contact time and dilution
Contact time is how many minutes the item must stay wet; the label governs and hospital-grade quats commonly call for around 10 minutes. Mix only the dilution on the label, never top off a jar with water, and keep disinfectant in a labeled, covered container changed on the manufacturer's schedule or when visibly soiled. Quaternary ammonium compounds, phenolics, and 70% isopropyl alcohol are common choices.
Porous versus nonporous
Nonporous implements - metal extractors, tweezers, scissors, glass, hard plastic - are cleaned, then disinfected. Porous items - cotton, sponges, wooden applicators, files, paper, wax strips, and testers applied directly to skin - are single-use and discarded. Anything that touched blood is handled as potentially infectious regardless of material.
Hands, gloves, and the room
Wash hands with soap and water before and after every client, at least 20 seconds. Wear gloves for blood, lesions, waxing near broken skin, and any contact with body fluids; change gloves between clients and wash hands after removal - gloves do not replace hand washing. Disinfected implements live in a clean covered container separate from soiled ones. No food or drink at the station, covered waste containers, an SDS for every chemical, and chemicals kept in original or correctly labeled containers.
Blood and injury protocol
Stop the service, glove, clean the wound, apply antiseptic and a bandage, discard soiled materials into a covered lined container, clean and disinfect tools and surfaces, wash hands, and document the incident.
Worked example
A metal extractor falls on the floor. Wiping it with an alcohol swab is wrong: it is now soiled, and alcohol is unreliable on organic matter. Correct handling is to place it in the soiled area, clean with detergent and water, dry, submerge in hospital-grade disinfectant for the full label contact time, rinse if the label requires, dry, and return it to the clean covered container.
Traps that cost marks
"UV sterilizes"; "disinfect porous items"; "a quick spray is enough"; treating sanitizer and disinfectant as interchangeable; assuming gloves replace hand washing; disinfecting an implement that was never cleaned first.