Safety/Hazard Cont: Improved Identification of Listeria Spp
Feb 14 2006 Read 2136 Times
This innovative chromogenic medium detects B-glucosidase activity common to all Listeria species, resulting in distinct blue colonies. Selective agents within the medium inhibit other organisms that possess this enzyme, such as enterococci, in addition to background flora that may be present in the sample.
The addition of lecithin to the medium permits the further differentiation of L. monocytogenes and pathogenic L. ivanovii, both of which have the ability to produce the phospholipase enzyme, lecithinase (PCPLC). The activity of this enzyme produces a clearly visible, opaque white halo around L. monocytogenes and pathogenic L. ivanovii colonies.
The presence of PCPLC and another phospholipase enzyme (PIPLC) are required for virulence, although detection of one is sufficient for the identification of pathogenicity.
L. monocytogenes is the most common pathogenic Listeria spp. and has been found in humans and animals. Pathogenic strains of L. ivanovii (those that possess lecithinase activity) are primarily found in animals but have also been shown to cause infection in humans.
Do you like or dislike what you have read? Why not post a comment to tell others / the manufacturer and our Editor what you think. To leave comments please complete the form below. Providing the content is approved, your comment will be on screen in less than 24 hours. Leaving comments on product information and articles can assist with future editorial and article content. Post questions, thoughts or simply whether you like the content.
In This Edition Articles - The Movement Towards More Comprehensive Testing of Mycotoxins in Cannabis - Addressing proper HACCP implementation - Micropatterning: The art of micro-controlling...
View all digital editions
Jan 26 2021 Virtual event
Feb 23 2021 Cologne, Germany
Feb 28 2021 Virtual event
Mar 03 2021 Guanghzou, China
Mar 08 2021 Virtual Event