Causes and Spread of Infection

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Cases And Spread of Infections

1.1 Identify the differences between bacteria, viruses, fungi, and parasites.
The difference between bacteria, viruses, fungi and parasites are: Viruses are coated genetic material that invade cells and use the cell's apparatus for reproduction.

1.2 Identify common illness and infections caused by bacteria, viruses, fungi, and parasites.

Bacteria
Food poisoning, Bubonic plague, Bacterial meningitis, Cholera, Diphtheria, Rheumatic fever, Scarlet fever, Tuberculosis

Viruses:
Chicken pox, Hepatitis A, B, C and HIV, Influenza, Measles, Mumps, Shingles, Yellow fever

Fungi:
Athletes foot, Thrush, Tinea (Ring worm)

Parasites:
Malaria, Tape worm, Head louse, Bed bug, Body louse

1.3 Describe what is meant by ‘infection’ and ‘colonisation’

The meaning of infection and colonisation
Infection is an invasion of the body by a foreign substance such as germs, microbes and parasites these can infect the body in many different ways. Colonization is the development of a bacterial infection on an individual, as demonstrated by a positive culture. The presence of the bacteria on a body surface (like on the skin, mouth, intestines or airway). The infected person may have no signs or symptoms of infection while still having the potential to infect others. Infection begins when an organism successfully colonizes by entering the body, growing and multiplying. The meaning of systemic infection and localised infection are Systemic infection means it has infected the whole body, spreading possibly through the blood to all parts of the body causing an all over infection. Localised infection means the infection stays in one place more likely where the infection enters.
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