Recently, ln my Clinic, I have come across around 3 patients whose chief complaints were loose watery stool only once in the morning for the last couple of months. Two of the patients were of mid forties and one was about 5 yrs of age. They were healthy. Their lifestyle and diet habits were absolutely like normal middle class people. Initially, they were suggested to take only home made food and filtered water.

They were given anthelmentics two doses a week apart. After 2 weeks, they reported with the same complaints. Next, they were suggested R.E.Blood, Sugar, R.E of Stool and Urine. Nothing abnormality detected. What will be the next course of action?