1921
Volume 75, Issue 3
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645

Abstract

The colony overlay procedure for peptidases (COPP) is a simple, fluorogenic assay that can rapidly detect and quantify and in well water. Cleavage of the substrate L-lysyl-7-amino-4-trifluoromethylcoumarin by enzymes present in and species produces fluorescent foci on cellulose acetate membranes exposed to long-wave ultraviolet light. O1, O139, O155, and were readily detected using this procedure, whereas and other non- pathogens did not produce fluorescence. The assay is practical for assessing the relative safety of well water in areas that have experienced catastrophic devastation from natural disasters, acts of war, or civil strife and may help curb outbreaks of cholera and other enteric illnesses in affected areas. In tropical climates, the procedure may be adapted for use in areas without electricity.

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2006-09-01
2017-09-25
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  • Received : 19 Jan 2006
  • Accepted : 08 May 2006

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