Causes and Spread of Infections

1685 words 7 pages
Paige Edwards
Unit 4222-265
Causes and spread of infection

outcome 1- to understand the causes of infections identify the differences between bacteria, viruses, fungi and parasites.

1) Bacteria is a organism that is present in most habitats, as well as human bodies and other living organisms such as plants and animals. Bacteria multiplies by its self to progress and spread. Unlike other infections such as viruses, fungi or parasites bacteria is not always harmful in fact in many cases bacteria can be useful to the living organisms,habitats or plants that it infects. Viruses are a small infectious agent that can only multiply inside the cells of living organisms although unlike bacteria, fungi and parasites viruses are not
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2) Explain the ways an infective agent might enter the body.
There are four main ways in which infective agents may enter the body these are:
1- Infective agents can passed through the mouth and down to into the lungs, which is how infections such as coughs,cold, and other common airbourne are contracted.
2-Infective agents can also enter the body through cuts and wounds on the skin, although the skins main job is to act as a barrier agaisnt any infective agent that may come into contact with skin, often anything can goes directly into the wound or cut then provides a entry for infective agents to enter the body this is when infection sets in.
3- Another way that infective agents can enter the body in through digesting food or drink. This can be as a direct result of uncooked food or out of date drinks, which often results people feeling ill and experiencing stomach pains, this type of infective agent can pass through out the body when a person vomits or experiences diarrhea.

4-The last way that infective agents can enter the body is through the urinary and reproductive systems. This means the infective agent can remain as a localized infection or may be a systemic infection which means that it enters the blood stream within the body. These types of infective agents are usually sexually transmitted infections or


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