Which of the following is a group of bacteria found in human intestines, whose presence in water indicates contamination by disease-causing microorganisms?

Options

A. Streptococcus
B. Pseudomonas
C. Clostridium
D. Coliform

Answer

D

Explanation

Coliform bacteria are organisms that are present in the environment and in the feces of all warm-blooded animals and humans. Coliform bacteria will not likely cause illness. However, their presence in drinking water indicates that disease-causing organisms (pathogens) could be in the water system.