VetBact

Buffered peptone water (BPW) is used for instance as non-selective pre-enrichment of Salmonella spp.

The composition of BPW is peptone, NaCl, Na₂HPO₄.12H₂O, KH₂PO₄ and water.

Peptone is derived from animal milk or meat digested with a proteolytic enzyme. Peptone is the the sorce of carbon, nitrogen, vitamins and minerals in BPW. Sodium chloride maintains the osmotic balance and the medium is buffered with phosphates (pH = 7.2).

Updated: 2019-09-25.