Why coliforms are selected as indicator microorganisms? Discus briefly the membrane filter tests for their detection in water. What are advantages and disadvantages of this method over other methods?

Coliforms, a group of bacteria commonly found in the intestines of warm-blooded animals, are selected as indicator microorganisms in water quality assessment due to their prevalence and ease of detection. The presence of coliforms in water suggests possible fecal ______ ______ _________ ______ ______ _______ ____ _____ ________ ________.
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