Food Safety and Hygiene
Core concepts
Food safety hinges on preventing contamination through good hygiene practices (GHP), good manufacturing practices (GMP), and hazard analysis and critical control points (HACCP). Candidates must know the seven HACCP principles, the difference between a hazard (biological, chemical, physical, allergenic) and a risk (likelihood and severity), and the concept of critical limits and monitoring. Also understand microbiological criteria, temperature control, cross-contamination, and the role of cleaning and disinfection. Familiarity with key pathogens (Salmonella, Listeria monocytogenes, E. coli O157, Campylobacter) and their control measures is essential.
Traps in questions
- Confusing HACCP (a system) with a prerequisite programme (e.g., pest control, training).
- Misidentifying a critical control point (CCP) vs a control point (CP). A CCP is a step where control is essential to prevent, eliminate, or reduce a significant hazard to an acceptable level.
- Assuming zero tolerance for all pathogens; some have tolerance levels (e.g., Listeria in certain ready-to-eat foods).
- Overlooking that HACCP requires validation and verification, not just monitoring.
- Mixing up cleaning (removal of soil) with disinfection (reduction of microorganisms).
Worked example / rule of thumb
A question describes a step where metal detection is used to prevent physical hazards. Is it a CCP? Rule of thumb: if failure to control at that step would lead to an unacceptable health risk and there is a measurable critical limit (e.g., ferrous metal >2 mm), then yes, it is a CCP. Always link hazards to control measures and critical limits.
Exam focus
Be able to outline the HACCP logic sequence (assemble team, describe product, identify use, construct flow diagram, verify on-site, list hazards, determine CCPs, set critical limits, establish monitoring, corrective actions, verification, documentation).