Compass Listeria Chromogenic Media Biokar

Compass Listeria


Available in 20 and 120 plate formats, Compass Listeria agar plate is a selective medium for the differentiation, isolation and enumeration of Listeria monocytogenes in food matrices and environmental samples.

This medium is also available in dehydrated format (500g) in addition to the corresponding selective and enrichment supplements.



COMPASS® Listeria is a rapid alternative method used for the detection of Listeria monocytogenes and of Listeria spp, and also for the enumeration of Listeria monocytogenes in food products, and in environmental samples. EN ISO 16140-2 validated alternative method for the detection of Listeria monocytogenes and Listeria spp.

It features a single step of selective enrichment in Fraser ½ broth, followed by subculture onto COMPASS® Listeria Agar. Enrichment can be performed at 37°C for 18 to 24 hours, or at 30°C for 22 to 28 hours.

This method is certified NF VALIDATION, according to the validation protocol NF EN ISO 16140-2 of 2016 for all food products and samples from the industrial production environment. The reference method used for the validation is the standard NF EN ISO 11290-1 of 2017.

Listeria hydrolyze the 5-bromo-4-chloro-3-indolyl-β-D-glucopyranoside (or X--glucoside). The resulting product is subjected to an oxidative dimerization that forms a blue precipitate in the center of the colonies.

Phosphatidyl-inositol is used as a substrate for the detection of phospholipase C of Listeria monocytogenes. When it is degraded, an opaque precipitate is formed around the colonies.

Secondary microflora is inhibited by the association of lithium chloride and a judicious mixture of selective agents that include several antibiotics and an antifungal agent.

New product
© Innovation Diagnostics© All rights reserved | Sitemap | Privacy Policy | Cookies