Listeria Monocytogenes is one of the most virulent foodborne pathogens. Whilst it is killed by heat processes such as pasteurisation it is innately resistant to harsh environmental conditions e.g. it survives low pH, high salt and can grow at refrigeration conditions as well as producing biofilms. This can result in it persisting in food processing environments with the potential to contaminate foods. Foods that receive no further cooking or heat treatments such as ready-to-eat foods are an issue.

The International Organization for Standardization (ISO), published revised EN ISO 11290-1 and EN ISO 11290-2 standards in 2017. In Part 1, a horizontal method for the detection of Listeria monocytogenes and Listeria spp. is specified, and in Part 2, the enumeration of these organisms in food, animal feed and environmental samples is described.

Liofilchem have implemented all the requirements described in both part 1 and part 2 of the revised EN ISO 11290:2017. Liofilchem dehydrated culture media, ready-to-use media in agar plates, tubes, bottles, bags are all compliant with EN ISO 11133:2014. 

Morpholinepropanesulfonic acid-buffered Listeria enrichment broth (MOPS-BLEB) is a selective liquid medium used for the isolation and identification of Listeria monocytogenes from food, i.e. red meat, poultry, egg products, and fish, and environmental samples, according to the USDA-FSIS method.

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ref. 24489

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