InTray™ Colorex™ Listeria ID (Listeria Identification)

Listeria Identification

InTray™ Colorex™ Listeria and InTray™ Colorex™ Identification Listeria (traditionally used in tandem) isolate, chromogenically differentiate, and confirm the presence of Listeria monocytogenes. The InTray™ Colorex™ Listeria provides initial differentiation and presumptive identification of Listeria species while the InTray™ Colorex™ Identification Listeria provides confirmation of suspect L. monocytogenes colonies plated from the InTray™ Colorex™ Listeria. Together, they make preliminary detection and confirmation easy by producing distinct chromogenic differences between growing organisms within as little as 18-24 hours. Both devices inhibit the growth of mold, fungi, and other bacteria, including E. coli and E. faecalis.

Visual Results of suspect colonies taken from InTray™ Colorex™ Listeria and plated on the InTray™ Colorex™ Identification Listeria:

  • Listeria monocytogenes - Rose with white halo
  • Listeria innocua – Rose without halo
  • Listeria ivanovii – Colorless with halo
  • Bacillus cereus – Colorless with halo
Detects Listeria, with Listeria monocytogenes confirmation
storage Refrigeration (2-8°C)
incubation 18-24 hours


Please Call (800) 964-6466 for pricing

quantity 5 Pack 20 Pack
code 10-7517 10-7511



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