Peptone water

{{Short description|Microbial growth medium}}

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.{{cite web|url=https://himedialabs.com/TD/M028.pdf|url-status=live|archive-url=https://web.archive.org/web/20220508055629/https://himedialabs.com/TD/M028.pdf|archive-date=8 May 2022|website=HIMEDIALabs|title=Peptone Water {{!}} Data Sheet|year=2011|access-date=2 November 2016}} Peptone water is also a non-selective broth medium which can be used as a primary enrichment medium for the growth of bacteria.{{cite book|url=https://books.google.com/books?id=7tfTEogvlIIC&dq=non-selective%20buffered%20peptone%20water&pg=PA666|last1=Baird|first1=R. M.|last2=Corry|first2=J. E. L.|first3=G. D. W.|last3=Curtis|title=Pharmacopoeia of Culture Media for Food Microbiology|date=23 April 1996|page=66|location=Amsterdam; New York|publisher=Elsevier Science|isbn=9780080530123|oclc=162705546}}{{Cite web|last=Sandle|first=Tim|date=18 June 2014|title=Assessment of Culture Media in Pharmaceutical Microbiology|url=https://www.americanpharmaceuticalreview.com/Featured-Articles/163589-Assessment-of-Culture-Media-in-Pharmaceutical-Microbiology/|access-date=8 May 2022|website=American Pharmaceutical Review}}