Infection Control, Sanitation, and Safety
The core distinction
Infection-control questions almost always turn on three words: clean, sanitize, and disinfect (and, rarely, sterilize). Cleaning removes visible debris with soap and water. Sanitizing reduces the number of bacteria to a safer level. Disinfecting destroys most pathogens on a nonporous surface. Sterilizing destroys all microorganisms, including spores. A disinfectant cannot work on a dirty surface, so cleaning always comes first.
Know your organisms
Bacteria are classified by shape: cocci (round), bacilli (rod), spirilla (spiral). Viruses are far smaller and need a host cell (hepatitis B, HIV, herpes). Fungi cause onychomycosis and tinea pedis. Parasites cause pediculosis. Spores are the hardest form to kill, and ordinary disinfection does not kill spores.
Products and labels
Look for an EPA-registered hospital-grade disinfectant. A tuberculocidal claim means it also kills Mycobacterium fortuitum, the organism associated with whirlpool footbaths. Follow the label's dilution and contact time (often 10 minutes) exactly. Quaternary ammonium compounds are common; bleach is mixed 1 part bleach to 9 parts water for a 10% solution.
Implements and personal safety
Nonporous items (metal, glass, hard plastic) can be disinfected. Porous items (files, buffers, wooden sticks, nail brushes) cannot and must be single-use or discarded. Keep wet sanitizers covered and change solutions per the manufacturer. Keep an SDS (formerly MSDS) for every product, follow OSHA bloodborne-pathogen rules, wash hands before and after each service, and wear gloves and eye protection.
Rule of thumb
If an item can soak up liquid, it cannot be disinfected. A file that touches the floor is discarded, not wiped.