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.