3.1.6

Communicable Disease - Bacteria

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Bacteria

Bacteria are small living cells that either damage cells directly or by producing toxins (poisons). Bacteria can reproduce rapidly in warm, moist conditions that have a good supply of oxygen. Some examples of bacterial diseases:

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Salmonella

  • If food has not been cooked properly or has been prepared in unhygienic conditions, then we may ingest (eat) Salmonella bacteria that cause food poisoning.
  • The bacteria release toxins (poisons), causing fever, stomach pain, vomiting and diarrhoea.
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Gonorrhoea

  • Gonorrhoea is a sexually transmitted disease.
  • Its symptoms include pain when urinating and a thick yellow or green discharge from the vagina or penis.
  • Barrier methods of contraception, such as condoms, can be used to stop the bacteria spreading from person to person.

Jump to other topics

1Cell Biology

1.1What's in Cells?

1.2Cell Division

1.3Transport in Cells

2Organisation

2.1Principles of Organisation

2.2Enzymes

2.3Circulatory System

2.4Non-Communicable Diseases

2.5Plant Tissues, Organs & Systems

3Infection & Response

4Bioenergetics

5Homeostasis & Response

5.1Homeostasis

5.2The Human Nervous System

5.3Hormonal Coordination in Humans

5.4Plant Hormones

6Inheritance, Variation & Evolution

6.1Reproduction

6.2Variation & Evolution

6.3Genetics & Evolution

6.4Classification

7Ecology

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