E. coli organism

Sample Transport ☆ Culture ☆ Chromogenic Result

InTray® COLOREX™ ESBLBiomed InTray Colorex ESBL culture media for Extended Spectrum Beta-Lactamase producing gram-negative bacteria diagnostics



Quick Links: Specifications Detection Incubation Storage

COLOREX ESBL Agar is a selective and differential chromogenic medium, containing an extended-spectrum beta-lactam selective agent, intended for use as a plating technique to obtain a pure culture of Enterobacteriaceae that produce extendedspectrum beta-lactamase (ESBL). The test can be performed with samples composed of mixed populations of bacteria, e.g., stool, biological fluids, surface streaks, etc.

Sub-culture is necessary for bacterial identification and susceptibility testing


Product Principle
  • Combine collection, culture, result and microscopic observation in one device.  
  • Highly selective prepared media in a device designed for in-vitro specimen transport and incubation.
  • Rapid presumptive-positive diagnosis without re-plating.  Intray can be placed directly on microscope stage
  • Fully enclosed cassette with Tyvek® air filtration prevents contamination and exposure, post-collection.   
Simple Convenience
  • InTray is designed for specimen collection/ inoculation at point-of-care
  • Saves time, material cost and waste, reducing exposure to collected sample
  • Place directly on the microscope tray for observation through the cassette’s clear anti-fog window
  • Visual chromogenic differentiation
Accurate Detection

Specially formulated medium promotes growth and chromogenic differentiation

Test Strain



ESBL Strains

K. pneumoniae 700603 Metallic Blue
E. coli BAA-196 Reddish / small

Non-ESBL Strains

E. coli 25922 Inhibited
E. faecalis 24212 Inhibited
P. aeruginosa 10145 Inhibited
S. aureus 25923 Inhibited
C. albicans 60193 Inhibited
Time to Result
  • 18-24 hours, incubated at 37ºC for positive
  • Extended 6 month shelf life (2-8°C) from date of manufacture
  • Can tolerate extended periods at controlled room temp (≤ 25˚C), with no loss in performance.
  • Stool
  • Biological fluids
  • Surface streaks

Features and Benefits


  • Extended 6-month shelf life from date of manufacture
  • Durable and stackable for incubation
  • No re-plate or wet mount 
  • Once inoculated, no other culture preparation is required... saving time and cost. 
  • Designed for specimen collection/inoculation at point-of-care, a fully enclosed system for transport, incubation, result and microscopic observation. 
  • The sealed prepared media device is selectively formulated for accurate detection and identification of pathogens and non-pathogens
  • Visual chromogenic differentiation and/or selective production of distinctive colony growth with typical identifiable morphology 


  • Fully enclosed cassette with air filtration system
  • Nutritive culture colony growth medium, formulated for selectivity and specificity 
  • Anaerobic or aerobic system available 


  • Time-to-result
  • Cost of laboratory materials 
  • Medical waste
  • Risk of exposure or contamination

Instructions for Use

Biomed offers extensive product documentation for each of our products. If you would like to review these, please see the Product Documentation section in the upper right of this page. 

CE Marked

FDA Registered in USA - For Research Use Only

COLOREX ESBL is not intended for use in the identification of colonization with extended-spectrum beta-lactam-resistant bacteria to aid in the prevention and control of ESBL-resistance in healthcare settings.

COLOREX ESBL is not intended to diagnose infections by extended-spectrum beta-lactam-resistant bacteria, guide or monitor treatment for infections, or provide susceptibility results to extended-spectrum beta-lactam. Sub-culture is necessary for bacterial identification and susceptibility testing.

Ordering Information

Product Qty Item #
InTray COLOREX ESBL Custom Call for Pricing

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