The Microbiological Dangers Of Food

Learning Points

  1. Expired food can smell normal.
  2. Bacteria can immediately infect food that has been dropped on the floor. The risk is higher in wet, squishy things compared to dry substances. It increases with time spent on the ground.
  3. With meat that is considered safe to have rare on the inside, the principle is that cooking the outside sufficiently kills bacteria on the surface.


  1. Moir, C. (2018). Food safety: are the sniff test, the five-second rule and rare burgers safe?. [online] CSIROscope. Available at: [Accessed 13 Jun. 2018].

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