Tuesday, 21 September 2021 08:42

Water - Class 6 Science Revision Notes

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Waterborne Diseases

They are diseases that are spread through contaminated water. They include:

  1. Cholera
  2. Typhoid
  3. Bilharzia.


It is caused by bacteria. it can cause death within 24 hours if not treated. It causes death through dehydration.

Signs and Symptoms

  • Violent diarrhoea (rice water).
  • Vomiting.
  • Severe abdominal pains
  • Wrinkled skin due to dehydration.
  • Sunken eyeballs


It mainly affects the intestines. It is also known as typhoid fever.

Signs and Symptoms

  • Pain in the joints and muscles
  • High fever
  • Abdominal pains
  • Skin rash


It is caused by bilharzia worms or blood flukes. It is carried by water snails.

The disease mainly affect the bladder and intestines
Bilharzia worms enter the body through the skin.

Signs and Symptoms

  • Blood in urine and stool
  • Coughing may occur
  • Abdominal pain
  • Swimmers itch
  • Fever

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