Record Display for the EPA National Library Catalog
RECORD NUMBER: 12 OF 35
|OLS Field Name||OLS Field Data|
|Main Title||Method 1103.1: Escherichia coli (E. coli) in Water by Membrane Filtration Using Membrane-Thermotolerant Escherichia coli Agar (mTEC), July 2006.|
|CORP Author||Environmental Protection Agency, Washington, DC. Office of Water.|
|Additional Subjects||Escherichia coli ; Membrane filtration ; Water sampling ; Bacteria ; Agar ; Enumeration ; Epidemiology ; Microorganisms ; Criteria ; Water quality ; Marine environment ; Health effects ; Gastroenteristis ; Feces ; Water pollution effects ; Surface waters ; Counting methods ; Calibration ; Growth(Biology) ; Contamination ; Quality control ; Pollution prevention ; Laboratories ; Test methods ;|
The MF method provides a direct count of bacteria in water based on the development of colonies on the surface of the membrane filter (Reference 18.4). A water sample is filtered through the membrane which retains the bacteria. After filtration, the membrane containing the bacterial cells is placed on a selective and differential medium, mTEC, incubated at 35DGC for 2 h to resuscitate injured or stressed bacteria, and then incubated at 44.5DGC for 22 h. Following incubation, the filter is transferred to a filter pad saturated with urea substrate. After 15 min, yellow, yellow-green or yellow-brown colonies are counted with the aid of a fluorescent lamp and a magnifying lens.