Presence of E. coli in ...
Published by Abdus Saboor, Water Quality Specialist, WASH Section, UNICEF Ghana
Presence of E. coli in drinking water could be assessed by filtering 100 mL of water through a 0.45 micron membrane filter (Millipore Microfil®) using a new low-cost filtration apparatus. The membrane filter is then placed on to Compact Dry E. coli growth media plates (Nissui). Incubation could be done keeping the plates close to the body in pocket to maintain a temperature of ≥30°C even during the night. After 24 hours, the number of blue colonies, signifying the presence of E. coli colony forming units (cfu) on the plats.