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What is disease?

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Rural Technology

A disease is an abnormal condition of an organism that impairs bodily functions, associated with specific symptoms and signs. In simple words, it is a condition of an individual not feeling well or a condition opposite to health.

Classification of diseases

Diseases can be classified as:

  • 1. Air borne: Disease which occur due to inhalation of germs from the diseased person through air. E.g. T.B., Influenza, swine flu etc.
  • 2. Water borne: Disease caused by drinking contaminated water having microorganisms like bacteria, virus etc. E.g. Cholera, typhoid, Hepatitis, jaundice etc.
  • 3. Food borne: Disease caused by taking contaminated or infected food having microorganism. E.g. Food poisoning, Diarrhoea, vomiting, Worm infestation, etc.
  • 4. Insect borne: Disease caused by bite of mosquitoes of different types E.g. Malaria, Dengue, filaria etc.
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