A student complains that it makes no sense Madison Micro Final Quest

Question 29 / 102: A student complains that it makes no sense to worry about coliform bacteria in water, since we naturally possess harmless coliforms in our intestines anyway. Why do regulatory agencies worry about coliform bacteria in water supplies, then?

A The coliforms in our intestines can sometimes turn harmful, causing intestinal infections.
We need to constantly be on guard against this happening. Coliforms in water might add to this
potential problem.

B Coliforms are indicator organisms. Their presence in water indicates fecal pollution, and therefore
the possibility that fecal-borne pathogens are present.

C Regulatory agencies are worried that multiple types of coliforms in water might lead to greater
antibiotic resistance in the bacterial populations. They try to keep them out of water to keep
antibiotic resistance levels down.

D Regulatory agencies simply need something to do to justify their existence. There is no real
danger from coliforms in water supplies.

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