Question

The presence of coliform bacteria beyond the prescribed limit indicates ........................ by disease causing micro-organisms.

Answer 1

Coliform bacteria are rod-shaped gram-negative bacteria which are found in the gut of humans. For example, Escherichia coli. These bacteria are non-spore forming and can ferment lactose Presence of coliform bacteria in water bodies indicates faecal contamination of water. Contamination of water with faecal matter can cause severe illness as it also indicates the presence of several other disease-causing microorganisms.

So, the correct answer is 'contamination.