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Economic Importance of BGA

Useful activities: -

  • They provide fertility to soil by nitrogen fixation.

eg. Nostoc, Anabaena, Aulosira, Oscillatoria

  • The most proteinaceous food for animals -

eg. Spirulina

  • It gives fertility to sterile alkaline soil and USAR soil. BGA secretes an acidic chemical which decreases the alkalinity of soil

eg. Nostoc commune, Scytonema ocellatum, Aulosira fertilissima

  • Some BGA are used as green manure

eg. Anabaena, Spirulina

  • Some BGA secrete toxin, which inhibits the growth of mosquito larva in water

eg. Oscillatoria, Anabaena, Aulosira

Harmful activities: -

  1. Water bloom
  2. BGA that grow in water tanks, pollute the water

eg. Oscillatoria

Some Important Points:… (48 more words) …

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Economic Importance of Bacteria - Harmful Activities

  1. Disease in Human beings

Table showing the Disease in Human beings

The Disease in Human beings

Disease

Bacterium

Tuberculosis (T. B. )

Mycobacterium tuberculosis

Leprosy

Mycobacterium leprae

Diphtheria

Corynebacterium diphtheriae

Tetanus

Clostridium tetani

Typhoid

Salmonella typhi

Plague

- Pasteurella pestis or Yersinia pestis

Pneumonia

Diplococcus pneumoniae or Pneumococcus pneumoniae

Jaundice

Leptospira ictero

Pertussis

Bordetella pertussis

Meningitis

Neisseria meningitidis

Gonorrhoea

Neisseria gonorrhoeae

Cholera

Vibrio cholerae

Dysentery

Shigella dysenteriae

Syphilis

Treponema pallidum

2. Disease in Animals -

Table showing the Disease in Animals

The Disease in Animals

Anthrax

Bacillus anthracis

Black leg

Clostridium chanvei

3. Disease in plants -

Table showing the… (250 more words) …

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