A 100 ml sample of water is filtered through a sterile membrane, and the membrane is transferred to a plate of m-Endo agar.Following overnight incubation at 37°C, 57 green metallic colonies appear.The coliform count is

Question

Quizplus · Accepted Answer

The presence of 57 coliform colonies in a 100 ml water sample is too high for drinking water, which typically requires zero coliforms per 100 ml. However, it may still be acceptable for recreational use, which has higher allowable limits.

A 100 Ml Sample of Water Is Filtered Through a Sterile