PP3053 – Colorex™ C3GR

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PP3053 – Colorex™ C3GR

Colorex C3GR is a chromogenic screening medium for the detection of β-Lactamase producing Gram-negative bacteria in clinical specimens. The selectivity of the medium allows for detection of ESBL and/or AmpC producing isolates that exhibit a reduced susceptibility to 3rd generation cephalosporin antibiotics. The chromogenic reactions allow for species differentiation on presumptive positive isolates.


Additional Information


Pack Size

Shelf Life (days)

Storage Temp (°C)


Firm Gel


Recommended Incubation

Aerobically at 37°C for 18-24 hours


Fill Volume

Product Description

Organisms Ref. No Result
Escherichia coli (ESBL) ESBL 1 Red colonies
Klebsiella onuemoniae (ESBL) ESBL 12 Metallic blue colonies
Escherichia coli NCTC 12241 Inhibited
Klebisella pneumoniae NCTC 9633 Inhibited
Enterococcus faecalis NCTC 12697 Inhibited


  PP3053 – C3GR