Laboratory Products
Chromogenic Listeria Agar Meets Iso Recommendations
Nov 06 2006
The selective chromogenic medium, comprised of OCLA Base (ISO) [CM1084] and Listeria Selective Supplement (ISO) [SR0226E], detects the ?-glucosidase activity common to all Listeria species resulting in distinct blue colonies. The addition of phosphatidylinositol at 2g/L, as recommended in the ISO formulation, detects phosphatidylinositol phospholipase C (PIPLC) produced by pathogenic Listeria species. Alternatively, the addition of Oxoid Chromogenic Listeria Differential Supplement [SR0228E] detects phosphatidycholine phospholipase C (PCPLC). Either supplementation results in a clearly visible, opaque white halo around pathogenic Listeria colonies.
Both PIPLC and PCPLC are associated with the virulence of Listeria, but detection of either enzyme is sufficient for the identification of pathogenicity. Listeria monocytogenes is the most common pathogenic Listeria species, but some strains of L. ivanovii may also possess these enzymes. Pathogenic L. ivanovii will also produce blue colony halos on OCLA (ISO).
Digital Edition
Lab Asia 31.2 April 2024
April 2024
In This Edition Chromatography Articles - Approaches to troubleshooting an SPE method for the analysis of oligonucleotides (pt i) - High-precision liquid flow processes demand full fluidic c...
View all digital editions
Events
Apr 28 2024 Montreal, Quebec, Canada
May 05 2024 Seville, Spain
InformEx Zone at CPhl North America
May 07 2024 Pennsylvania, PA, USA
May 14 2024 Oklahoma City, OK, USA
May 15 2024 Birmingham, UK