Infection Control: Levels of Control, Chain of Infection, and Pathogen Types
The three levels of control
Cleaning (soap/detergent and water, plus mechanical scrubbing) removes visible debris and many microbes, but it is a prerequisite for disinfection, never a substitute. Disinfection uses an EPA-registered hospital-grade disinfectant at the correct dilution for the labeled contact time and destroys most - not all - microorganisms; bacterial spores survive. Sterilization destroys all microbial life including spores and is not performed in a nail salon. Classic traps: a stem question describing an implement "sterilized" in a jar of blue liquid, or a client's hands "soaked in disinfectant."
The chain of infection
Pathogen → reservoir → portal of exit → mode of transmission → portal of entry → susceptible host. Break any link and infection stops. In the salon the reservoir is usually the implement, the pedicure basin, a towel, or the technician's hands; the portal of entry is a nick, a torn cuticle, or a dry nail fold. Transmission is direct (skin-to-skin, tool to skin) or indirect (contaminated implements, towels, brushes, polish bottles dipped into a shared base).
Know your organisms
- Bacteria: staphylococci and streptococci (pus-forming), Pseudomonas (green-black discoloration under an enhancement), mycobacteria (whirlpool folliculitis from poorly cleaned jets).
- Viruses: hepatitis B (the most infectious bloodborne pathogen and able to survive on dry surfaces), hepatitis C, HIV, HPV (warts), herpes simplex.
- Fungi: dermatophytes causing onychomycosis and tinea pedis.
- Parasites: scabies and lice - refer out.
Standard (universal) precautions mean treating every client's blood and body fluids as infectious, because appearance tells you nothing about carrier status.
Rule of thumb: if an item touches skin and cannot be thrown away, it is cleaned, then fully immersed in disinfectant for the labeled contact time (commonly 10 minutes), then rinsed and dried before reuse.