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Casein nutrient agar

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This is an old revision of this page, as edited by Jaeger5432 (talk | contribs) at 04:43, 17 July 2013 (removed Category:Laboratory equipment using HotCat). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Casein Nutrient Agar (CN) is a growth medium used to culture isolates of lactic acid bacteria such as Streptococcus thermophilus and Lactobacillus bulgaricus. It is composed of standard nutrient agar with the added ingredient of skim milk powder, which contains casein. Lactic Acid Bacteria will precipitate casein out of the agar by lowering the pH. This will produce a cloudy appearance around the colonies that do this. This medium is not regarded as selective as it supports the growth of a wide variety of organisms.

References

  • University of Minnesota, Medical School. (2006). Biology of Microorganisms Laboratory Manual.
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