Peptone water

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Peptone water is a microbial growth medium composed of peptic digest of animal tissue and sodium chloride. The pH of the medium is 7.2±0.2 at 25 °C and is rich in tryptophan.[1] Peptone water is also a non-selective broth medium which can be used as a primary enrichment medium for the growth of bacteria.[2]


  1. ^ HIMEDIA. Data sheet; Peptone water. 2011 [cited 2016 2/11]; Available from:
  2. ^ Baird, R. Corry, and G. Curtis, Pharmacopoeia of culture media for food microbiology. Int. J. Food Microbiol, 1987. 5: p. 187-299.