Food Safety and Meal Provision
What this domain tests
Whether you can apply HACCP thinking in a domestic or catering kitchen and plan meals that are simultaneously safe, nutritionally adequate and practical.
Core rules
- HACCP's seven principles: hazard analysis, determine CCPs, set critical limits, monitor, take corrective action, verify, keep records. It is a control system, not a cleaning rota.
- Bacteria need moisture (water activity above about 0.85), protein, near-neutral pH, time, warmth and, for most, oxygen. The danger zone is 5–63 °C.
- Key controls: fridge ≤5 °C, freezer −18 °C, cook core to 75 °C for two minutes, hot-hold at ≥63 °C, reheat once to ≥82 °C, cool from 63 °C to 5 °C within 90 minutes.
- Spore-formers survive normal cooking: Clostridium botulinum (anaerobic, low-acid canned foods), Bacillus cereus (cooked rice), Clostridium perfringens (stews).
- Others: Salmonella (eggs, poultry), Campylobacter (poultry, cross-contamination), E. coli O157 (minced beef, unpasteurised dairy), Listeria (chilled ready-to-eat foods; it grows at fridge temperature, so it matters in pregnancy), Staphylococcus aureus (hand contact; its toxin is heat-stable).
- Cross-contamination: separate boards and knives, store raw below cooked food.
- Labels: use-by is about safety, best-before about quality. The 14 regulated allergens must be emphasised in the ingredients list.
- Personal hygiene: handwashing, no jewellery, cover cuts, exclude symptomatic staff.
Worked example
Chicken curry for 60 covers. Hazards are survival and growth of Campylobacter and of spore-formers. CCPs are cooking (core ≥75 °C, probed and logged) and cooling (blast chiller, trays no deeper than 5 cm, 63 °C to 5 °C within 90 minutes). Corrective action: keep cooking if the core is short of temperature; discard if the cooling time is exceeded. The temperature log is the verification record.
Traps that cost marks
- "Freezing kills bacteria" - it only stops growth.
- Assuming food poisoning comes from the last meal eaten; incubation periods vary.
- Treating HACCP as paperwork rather than as control points.
- Ignoring Listeria because it multiplies in the fridge.