AbstractExperimental studies on the subject. Coliform Bacteria infection contamination in drinking water of male kite school phon narat College lop buri is intended to monitor the quality of drinking water, microbiological male kite school and College Lopburi to narat phon quantities E. coli and coliform in water, including ice, according to the service point that students in high school use is consumed. Perform step 3 is as follows:Step 1 the first stage of testing (Presumptive test) to test the fuel feed system uses 3 bulbs with 3 serial dilution is the number of ml of the sample into different batches as follows: 10-1-0.1 mg/l.Step 2 confirmation step test (test Confirm) because the first test cannot indicate that bacteria in water samples are coliform bacteria or coliform bacteria culture phenotypes, therefore, must be confirmed by testing the fuel dump in the Brilliant Green Lactose meal broth bile bacterial and EC-medium.Step 3 complete step tests (Completed test) semen that cause bubbles in the coming confirmation process to remove infections on solid food, petri dish, Eosin Methylene Blue agar (BMB)Experimental results showed that the water sample in sample 3 showed.1. the value of coliform bacteria.The ice in the cafeteria > 2400 MPN/100 mL.Drinking water in the MPN/100 mL 93 cafeteria.น้ำกรองบนหอพัก 9 MPN/100 mL2.ค่าฟีคัลโคลิฟอร์มแบคทีเรียน้ำแข็งในโรงอาหาร >2400 MPN/100 mLน้ำดื่มในโรงอาหาร 93 MPN/100 mLน้ำกรองบนหอพัก 9 MPN/100 mL
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