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Colitag Ready-to-use Presence Absence Test for Coliform & E.coli
Colitag™, made by CPI International, is a ready-to-use ONPG/MUG based test, which can be added directly to a liquid or semi-liquid sample.
If coliforms are present, ONPG will produce a distinct yellow color. If E. coli is present, the sample will fluoresce a bright blue color under long-wave (366nm) UV light.
Incubation of the test is performed at 35°C for 22-26 hours.
Benefits of Colitag include:
Allows you to run a traditional Presence/Absence (P/A) or MPN format
Detects 1 CFU of total coliform or E. coli bacteria per 100ml water sample
Resuscitates chlorine injured bacteria
Provides selectivity with growth inhibitors without affecting recovery of target organisms
Brighter blue fluorescence eliminates questionable positive E. coli results
Simultaneously provides 24-hour fecal coliforms and E. coli determinations
Left bottle: Negative result Middle bottle: Positive for coliform Right bottle: Positive for E. coli by fluorescence
Colitag™ is capable of resuscitating and detecting even single cells of severely injured E. coli and coliforms. In March of 2004, Colitag™ earned US EPA approval for use as a presence-absence test in drinking water and approval for use as an enumerative test in MPN format in May of 2005.
Colitag™ is available for use in municipal and bottled water testing, beverage waters and other QC coliform monitoring testing. Preliminary testing has also shown promising results for monitoring shellfish meats and shellfish-growing waters, as well as for waters growing alfalfa sprouts.
Colitag is now available from Hardy Diagnostics.
NOTE: This item is from our 'historic' database and may contain information which is not up to date.