Q. The presence of which bacteria indicates faecal contamination of water?

A
Staphylococcus
B
Enteritis salmonella
C
Sulphur bacteria
D
Coliform bacteria
Solution:
  • Coliforms are bacteria that are always present in the digestive tracts of animals, including humans, and are found in their wastes. They are also found in plant and soil material.

  • Staphylococcus bacterium is a member of the microbiota of the body, found in the upper respiratory tract and on the skin.

  • Salmonella lives in the intestinal tracts of animals and birds and is transmitted to humans by contaminated foods of animal origin.

  • Sulfur bacteria are found in the anoxic layer of their habitat, which promots the growth of many heterotrophic organisms by supplying inorganic nutrients to the above oxic layer.

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