Sanitary-Hygienic Requirements and Infection Control
What candidates must know
This domain covers hand hygiene, sterilization and disinfection, environmental cleaning, waste management, and the prevention of healthcare-associated infections. Know the World Health Organization's five moments for hand hygiene and the difference between sterilization (destroys all microorganisms including spores) and disinfection (reduces pathogens, levels vary). Understand instrument reprocessing steps: cleaning, disinfection, sterilization, and storage. Learn standard precautions versus transmission-based precautions, sharps safety, post-exposure prophylaxis, and the management of needlestick injuries. Also know food hygiene, water quality, ventilation, and sanitation requirements in healthcare facilities.
Traps in questions
A frequent trap is confusing disinfection with sterilization - for example, choosing alcohol wipes for instruments that require autoclaving. Another is applying transmission-based precautions when standard precautions suffice. Hand hygiene questions often test the correct sequence and duration, or whether gloves replace hand washing (they do not). Watch for questions on the correct first action after a needlestick: wash the site with soap and water, then report and assess for prophylaxis.
Worked example: rule of thumb
A surgical instrument contaminated with blood requires cleaning followed by autoclave sterilization, not chemical disinfection alone. Rule of thumb: if it enters sterile tissue or the vascular system, it must be sterile. After a needlestick from a hepatitis B positive source in an unvaccinated worker, give post-exposure prophylaxis promptly; for hepatitis C there is no vaccine, so follow-up testing is the path.