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Question

Describe certain bacterial diseases of human beings.

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Solution

Few diseases caused by bacteria are:
(i) Tuberculosis (T.B.) - T.B. is an infectious disease which is communicated from one person to another directly or indirectly. It is caused by the bacterium called Mycobacterium tuberculosis. T.B. can affect all part of the body such as lungs, lymph glands, bones, intenstine etc.
(ii) Cholera- Cholera is an acutely infectious, fatal disease and is more common during overcrowded fairs, festivals and after floods. Cholera is caused by the bacterium Vibrio Cholerae. IF is transmitted by files, contaminated water and food.
(iii) Typhoid - Typhoid is most common communicable disease is India. Typhoid fever is common in human of the age 1 to 15 years age group. Thyphod is caused by a rod - shaped and motile bacterium, called salmonella typhi which is commonly found in the intesstine of human beings. Human infection is direct. (iv) Diarrhoea- Diarrhoea is an abnormally frequent discharge of semisolid or fluid faeces. The diarrhoea spreads through infection by contaminated food, water, drinks, ahnds, clothes, etc. The causative agents of diarrhoea are mainly bacterial such as escherichia coli, clostridium botulinum, shigella dysentiriae, Campylobacter jejuri and salmonella.


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