Listeria Enrichment Broth + Supplements 1077 Condalab

Listeria Enrichment Broth with Supplements is the modified version of Listeria Fraser Broth ISO Cat. CL-1182. The medium is used for the selective enrichment and enumeration of Listeria monocytogenes and other Listeria species in all food types, including milk and dairy products, and environmental samples. The antibiotics are already included in the formula. Listeria monocytogenes is the bacterium that causes the infection listeriosis which is an illness that is vital when it comes to food safety. The control of this bacterium is important as it has the ability to grow at temperatures as low as 3°C. Listeria is killed by cooking and pasteurization so can be found in raw milk and foods made from raw milk as cheeses (particularly soft-ripened varieties) or ice cream as they do not require cooking. It can also live in food processing plants and contaminate a variety of processed meats.

Soy peptone and tryptone provide nitrogen, vitamins, minerals, and amino acids essential for growth. Sodium chloride supplies essential electrolytes for transport and osmotic balance. Dextrose is the fermentable carbohydrate providing carbon and energy. Yeast extract is source of vitamins, particularly the B-group essential for bacterial growth. Potassium phosphates act as a buffer system. Nalidixic acid blocks the DNA replication of susceptible bacteria and acts against many Gram-negative bacteria. The Acriflavine and cicloheximide are the Gram-positive selective components.