UNIT 4222-265 Causes and spread of infection.

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Unit 4222-265

OUTCOME 1.
1.
Bacteria are a single cell micro-organism that can only be seen from under a microscope. It survives off the nutrients from its surroundings.
Viruses are disease producing agents far smaller than bacteria. They are enclosed in a protein coating which makes them more difficult to destroy.
The basic unit of Fungi is a hypha which is a hollow tube. The hypha threads spread out over and into the food material making a visible mesh or mycelium. Some fungi form together to create toadstools. They spread by releasing spores into the environment. Fungi can cause diseases in humans in the form of yeasts such as ringworm, athlete’s foot and other diseases.
A parasite is an organism that lives on or in a host and gets its food from or at the expense of its host. There is a large group called eukaryotes that parasites are a part of, which Fungi is too. Parasites are different from bacteria or viruses because their cells share many features with human cells.
2.
Bacteria:
Food poisoning. (Salmonella).
Whooping cough.
Tuberculosis.
Tonsillitis.
Ear infections.
MRSA (Methicillin-resistant Staphylococcus aureus).
Meningitis.

Viruses:
Chicken pox.
AIDS/HIV.
Mumps
Common cold.
Herpes.

Fungi:
Athlete foot.
Yeast infections.
Ringworm
Thrush.

Parasites:

Tapeworms.
Schistosomiasis.
Sleeping sickness (trypanosomiasis).
Leishmaniasis.
Lice.
Fleas
Lymes disease (by ticks).
Scabies.

3.
Colonisation occurs whenever any one or more species populate an area and infection is the invasion of body tissues by disease causing micro-organisms, their multiplication and the reaction of body tissues to these micro-organisms.

4.
Systemic infection means that it is in the blood stream and spreading or has spread throughout the body. Localised infection means its only in a small area of the body, like a wound, cut or ulcer. Localised infection can become systemic if the spread.

5.
There are lots of practices in

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