Question

The presence of which bacteria is an indicator of water pollution?

• A. Salmonella typhi
• B. Vibrio cholerae
• C. E. coli (Coliform)
• D. Mycobacterium tuberculosis

Answer 1

Answer:

C. E. coli (Coliform)

The presence of E. coli in water indicates contamination and pollution, often due to fecal matter. Fecal indicator bacteria, including E. coli, are widely used as indicators to study the sources and fate of fecal contamination in the environment. The presence of E. coli in drinking water, for example, is associated with increased risk of both enteric pathogens and diarrheal disease, generally.