Formulated to ISO 6579, Buffered Peptone Water (BPW) is a pre-enrichment medium designed to help sub-lethally damaged Salmonella spp. recover before introducing them into a selective enrichment medium.
Enzymatic digest of casein is the source of the required nitrogen, carbon and vitamins. Sodium chloride maintains the osmotic balance in the medium. Di-sodium hydrogen phosphate and potassium dihydrogen phosphate act as buffers in the medium. This nutritious medium is free from inhibitors and is well buffered to maintain pH 7.0 for the incubation period. Sub-lethal injury to Salmonella spp. occurs in many food processes and this pre-enrichment step greatly increases the chance of their recovery, especially if a low number of cells are present in a sample.
- Storage temperature: 10 to 30°C
- Dehydrated medium appearance: fine powder
- Prepared medium appearance: liquid
- Dehydrated/prepared medium colour: pale straw
- Recommended incubation: Aerobically at 36 to 38°C for 16 to 20 hours
- pH: 7.0 ± 0.2
Ce produit répond aux critères suivants pour être admissible aux récompenses suivantes :