Discuss the Economic Importance of Bacteria - QS Study
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Many bacteria arc harmful to human beings, plants and other organisms, but there are also a good number of bacteria which are beneficial.

Harmfulness:

1) Human diseases: Bacteria cause a number of diseases to humans, such as- Typhoid, Pneumonia etc.

2) Animal diseases: Animals suffer from diseases, such as- Anthrax, Chicken-cholera etc.

3) Plant diseases: There is several bacterial diseases of plants e.g. Ring spot of Tobacco, bacterial wilting of tobacco, cotton root rot etc.

4) Spoilage of food: Spoilage of fruits, butter, milk etc, may be caused by bacteria.

5) Loss of at fertility: Some bacteria, convert nitrite and nitrate into nitrogen which later escape in air causing a loss of soil fertility.

 

Usefulness:

1) Medicine: Extracts from bacteria are used to prepare antibiotics. Such as- Polymixin, Tyrothricin etc.

2) Food Industry: A good number of food products are manufactured due to bacterial activities e.g. butter, Cheese etc.

3) Industry and Agriculture: Some bacteria are used in industries and also in Agriculture. Example:

  1. The tanning of leather
  2. Extraction of fibres from jute and hemp
  3. Production of vinegar, acetone, lactic acid, citric acid, vitamin etc.