Causes and Spread of Infection

Topics: Bacteria, Organism, Hygiene Pages: 3 (646 words) Published: November 16, 2012
Section Two: Task 1
1.1 Identity the differences between bacteria, viruses, fungi and parasites MICRO-ORGANISMS
BACTERIA – Bacteria are forms of spores that can multiply, some bacteria’s are difficult to destroy and are able to survive for long periods. Bacteria cells come in a variety of shapes and sizes, however all bacteria’s have the same basic structure, below is a image of bacteria cell with labels identifying what a bacteria cell consists of:

VIRUSES – viruses are smaller than bacteria and can only be seen under a microscope, they can only multiply in living cells. A virus is a simple structure. It is not a cell nor is it living. A virus is simply a coat of protein wrapped around genetic material. Below is an image of a virus and its structure, with labels identifying what a virus is made up off:

FUNGI – A fungi/fungus is an organism which lives by feeding on other organisms, below is an image of a fungi and its structure, with labels identifying what a fungi is made up of:

PARASITES – A parasite is a plant or animal which lives on or in another plant or animal as a host. Below is an image of a parasite with labels to identify its structure:

1.2 Identify common illnesses and infections caused by bacteria, viruses, fungi and parasites Below is a table of common illnesses and infections caused by either, bacteria, viruses, fungi and parasites, each illness is displayed in the causing micro-organism: Bacteria: Tuberculosis (two organisms called Mycobacterium tuberculosis)MRSA  (methicillin-resistant Staphylococcus aureus)SalmonellaClostridium difficile (pain and diarrhoea)Legionnaires disease (belong to the family Legionellaceae)| Viruses: Measles (rubeola virus)Common cold (caused by rhinoviruses or coronaviruses)Warts (human papilloma virus)HIV (Human Immunodeficiency Virus)Chicken pox (caused by a virus called the varicella-zoster virus)Hepatitis B ( belongs in the genus Orthohepadnavirus and is part of Group VII-type...
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