Unit 4222-265 Questions And Answers

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Unit 4222-265 Causes and spread of infection

Outcome 1
1. identify the differences between bacteria, viruses, fungi and parasites
Bacteria are single cell organisms, fungi are multi-cell organisms.
Viruses are made up of proteins and nucleic acids, they aren’t living whereas the others are. Viruses invade cells. They do not breathe or feed.
Parasites are animals or plants that live off other animals or plants.

2. identify common illnesses and infections caused by bacteria, viruses, fungi and parasites
Bacteria can cause food poisoning because of salmonella.
Viruses cause HIV, AIDS, colds and flus.
Fungi cause athlete’s foot.
Parasites cause worms and malaria.

3. describe what is meant by “infection” and “colonisation”
Infection
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explain the conditions needed for the growth of micro-organisms
Warmth, moisture and food are all need for the growth of a micro-organism.

2. explain the ways an infective agent might enter the body
An infective agent might enter the body through the air you breathe, food you eat, or through cuts or sores.

3. identify common sources of infection
Common sources of infection include bad hygiene and the lack of use of PPE. If you carry out personal care and don’t take proper measure to ensure you are protected from germs then it will cause spread of infection. The use of incorrect chopping boards when preparing food will also spread infection as you could be passing bacteria from raw meats onto cooked vegetable or other food.

4. explain how infective agents can be transmitted to a person
Infective agents can be transmitted to a person through the air they breathe. If they are working with or around sick people who are coughing, for example, then the germs will be in the air which can then be caught by other people. Bodily fluids are another way infective agents can be transmitted, through saliva or sexual contact, which can lead to the spread of STIs. Bacteria will multiply on food if it’s not cooked, stored or prepared properly so if a person eats that food it can also transmit infective agents into the body. Finally, if you have any open cuts, infective agents can be transmitted that way as it goes through the blood

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