title: Comparison of verification procedures for the membrane filter total coliform technique.
abstract: Verification of membrane filter total coliform colonies from drinking water was increased 87% by testing for the presence of beta-galactosidase and cytochrome oxidase, compared with verification by determination of gas production in lauryl tryptose broth. Over 90% of the coliforms verified by testing for beta-galactosidase and cytochrome oxidase were representative of the typical coliform genera.
mesh_terms: D001431:Bacteriological Techniques; D004755:Enterobacteriaceae / Q000302:isolation & purification*; D008851:Micropore Filters; D009009:Montana; D014462:Ultrafiltration; D014871:Water Microbiology; D014881:Water Supply