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
ILM 49.5 July
July 2024
Chromatography Articles - Understanding PFAS: Analysis and Implications Mass Spectrometry & Spectroscopy Articles - MS detection of Alzheimer’s blood-based biomarkers LIMS - Essent...
View all digital editions
Events
Jul 28 2024 San Diego, CA USA
Jul 30 2024 Jakarta, Indonesia
Jul 31 2024 Chengdu, China
ACS National Meeting - Fall 2024
Aug 18 2024 Denver, CO, USA
Aug 25 2024 Copenhagen, Denmark