Food Related Cause Of Ill Health And Food Safety Flashcards
What is a microbe
Mircoscopic plants and animals
Types of microbes
Bacteria,mould,yeast
Where are microbes found
Air,water,soil,dirt,dust,packaging,clothes,surfaces,equipment,people,insects and animals
How can microbes grow and multiply
The right temperature
Water(moisture)
Food to eat
Time to grow
Right amount of acid and alkali
Why do microbes make food unsafe and unfit to eat
• They put waste products and poisons into the food if people eat these, they become ill with food poisoning
- Large numbers of microbes in a food can make people ill because they irritate the digestive system
Ways that food handlers can prevent the cross contamination of mcirobes
- washing their hands before handling food; after handling raw meat, poultry, fish and eggs; after visiting the toilet; after putting food waste in the bin, after sneezing into a tissue
- keeping raw and cooked foods separate during storage and using separate
equipment to prepare them - using colour-coded boards and knives to prepare different types of food
• Cook food to a high temperature (at least 70°C) which will kill many microbes
• Cool food to a low temperature (0-5°C in a refrigerator). Microbes will still grow and multiply, but only very slowly
• Freeze food (minus 18° C to minus 22° C in a freezer). Microbes will become inactive (dormant) but will still be alive
• Dry food by taking out moisture, which will kill many microbes
• Cover food and store it correctly to stop microbes getting into it
• Preserve food by killing microbes:
- in acid (e.g. vinegar in pickles)
- in salt (e.g. dried salted fish)
- in sugar (e.g. jam).
What happens to microbes when frozen
Microbes will be inactive but will be alive
What happens to mcirobes when food is stored in the refrigerator
Cool food to a low temperature (0-5°C in a refrigerator). Microbes will still grow and multiply, but only very slowly
Signs of food poisoning that you cannot see
Headache,weakness,cold,stomach ache,feeling sick,aching
Signs of food poisoning that you can seen
Dizziness,high body temp,diarrhoea,being sick
groups of people for whom food poisoning is very dangerous?
Elderly people
Pregnant women
Ill people
People with a weak immunity
Name several types of bacteria that cause food poisoning?
Salmonella
Listeria
E.coli
S.aureus
foods where Salmonella is often found?
Chicken,raw meats,
How moulds start to grow on foods?
Moulds make food unsafe and unfit to eat by:
• sending out tiny spores (‘seeds’) which land on the surface of food. The spores germinate (start to grow) and send down roots into the food if conditions are right.
The waste produced by the mould go into the food through roots and contains toxins which satu in the food.
What bacteria do in the temperature Danger Zone?
5°c and 63°c bacteria multiply fast