) 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 are a group of bacteria that are commonly used as indicator microorganisms in water and food quality testing. The selection of coliforms as indicators is based on several factors, including:

1. Prevalence: Coliforms are found in high numbers in the intestines of warm-blooded animals, including humans and animals that are commonly consumed as food. As a result, they are often present in fecal matter and can contaminate food and water supplies.

2. Easy to detect: Coliforms are easy to detect using standard laboratory tests, such as the most probable number (MPN) method or ___ ____ ______ _____ __________ ______ _____ _______ ___ ____ _______.
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