Accurate and quantifiable overnight results

Enterolert E Main Image


  • Results in 24 hours.
  • Detect enterococci contamination in half the time of standard methods.
  • Eliminate tedious membrane filtration work: no confirmations, no transfer steps, no filtering required.
  • Developed for the European market and correlates with the EU Bathing Water Directive standard method for enterococci, ISO 7899-1.
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  • No media preparation.
  • No autoclaving.
  • No colony counting.
  • No glassware cleaning.
  • Less than 1 minute of hands-on time.
  • Complete results in 24 hours.
  • Correlates with ISO Method 7899-1.
  • Sensitive to 1 enterococci/100 mL.
  • Enumerates up to 2,419 enterococci per 100 mL without dilutions (with Quanti-Tray/2000).
  • Eliminates the subjective interpretation found in traditional methods.
Cost Effective
  • Up to 12-month shelf life minimises waste.
  • 24-hour test saves incubator space.
Quality Assured
  • The Quality Control Certificate for Enterolert-E is ISO 11133:2004 compliant.
  • The IDEXX Quality Control Laboratory is ISO 17025:2005 accredited.


How the Enterolert-E Test works

The Enterolert-E Test uses the IDEXX proprietary Defined Substrate Technology (DST) nutrient indicator to detect enterococci. This nutrient indicator fluoresces when metabolised by enterococci. DST improves accuracy and avoids the need for hazardous sodium azide suppressants used in traditional media.

How to Use

How to use the Enterolert-E Test

File Icon  View/print the Enterolert-E Test procedures.

Learn how to use the Enterolert-E Test

Step-by-step guide to using the Enterolert-E Test


Step 1

Add reagent to sample.

Step 2

Pour into Quanti-Tray (counts from 1–200) or Quanti-Tray/2000 (counts from 1–2,419).

Step 3

Seal using Quanti-Tray Sealer and incubate for 24 hours at 41°C ± 0.5°C.

Step 4

Count fluorescent wells and refer to the most probable number (MPN) table.


Q & A

Frequently asked questions and answers

How can I use the Enterolert-E Test?
The Enterolert-E Test was developed for use in Europe. It correlates with the EU Bathing Water Directive standard method, ISO 7899-1.

What species of enterococci can the Enterolert-E Test detect?
Some species of enterococci that the Enterolert-E Test detects are: faecalis, faecium, avium, gallinarum, casseliflavis, and durans.

What is the detection limit of the Enterolert-E Test?
The Enterolert-E Test detects enterococci at 1 organism/100 mL.

What is the shelf life of the Enterolert-E Test?
The Enterolert-E Test shelf life is up to 12 months from the date of manufacture.

What are the recommended storage conditions for the Enterolert-E Test?
Store at 2–30°C away from light.

What colour and consistency should the Enterolert-E reagent powder be?
The Enterolert-E Test reagent powder should be tan in colour; it should be dry and free-flowing. Any concerns about the colour or integrity of the powder should be directed to IDEXX Technical Support.

Can I quantify my Enterolert-E Test results?
Yes, the Enterolert-E Test can be run with Quanti-Tray, Quanti-Tray/2000 or any multiple-tube format.

Is there a comparator for the Enterolert-E Test ?
There is no comparator for the Enterolert-E Test. For comparison, use a negative control when interpreting results.

What are the disposal requirements for the Enterolert-E Test sample?
Check with your local authority for proper disposal of bacteriological biohazard materials at your facility.

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Resources & Product Information


IDEXX Water has reference materials and approval documents to support the many products in our water portfolio.

Product Information

Enterolert-E Test (20-test pack)
Catalogue Number: WENTE020

Enterolert-E Test (200-test pack)
Catalogue Number: WENTE200

Snap pack and Quanti-Tray bundles are available.

IDEXX Water Customer Support

UK Headquarters

IDEXX Technologies Ltd Units 1B & 1C, Newmarket Business Park, Studlands Park Avenue, Newmarket, Suffolk, CB87ER

Tel: 01638 676800


ISO Certifications

File Icon  ISO 9001:2008

File Icon  ISO 17025:2005

File Icon  ISO 14001:2004