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Causes And Spread Of Infection Essay Sample

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Causes And Spread Of Infection Essay Sample

Outcome 1 Understand the causes of infection
1. Identify the difference between bacteria, viruses, fungi and parasites? The difference between bacteria, viruses, fungi and parasites is: Bacteria
Bacteria is a single celled organism, bacteria have evolved to thrive in almost any environment and can be found in almost any substance/surface and also in the human body, only 1% of bacteria is actually harmful. It’s bad or infectious bacteria that cause illness as they rapidly reproduce and produce a toxin that kills or mutates cells, bacteria is also self sufficient.

Viruses
A virus is a small capsule that contains DNA or RNA, viruses, unlike bacteria are not self sufficient and need a host in order to reproduce I.E a human body. When a virus enters the body, it enters some certain cells and takes over making the now host cell make the parts the virus needs to reproduce, the cells are eventually destroyed through this process. The most common viruses is the common cold, which has no cure.

Fungi
Mould, yeast and mushrooms are all types of Fungi.
Fungi live in the air, water, soil and on plants and they can live in the body, usually without causing illness.
Some fungi have beneficial uses. For example, penicillin.
Fungi are also essential in making certain foods, such as bread and cheese. Certain types of Fungi can cause illness such as Candida which is a yeast that can cause infections such as thrush.

Parasites
A parasite is a tiny organism that lives in or on a host (A body) which they use in order to feed. Parasites can cause severe illness’s, there are 3 main types of parasites: protozoa, helminths, and ectoparasites.

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