Biology:Litmus milk
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Short description: Milk-based medium used to distinguish between different species of bacteria
Litmus milk is a milk-based medium used to distinguish between different species of bacteria.[1][2] The lactose (milk sugar), litmus (pH indicator), and casein (milk protein) contained within the medium can all be metabolized by different types of bacteria.[3]
Early in the development of microbiology, milk was used as a convenient, rich growth medium for propagating bacteria. The litmus in the medium acts as both a pH indicator and a redox (oxidation-reduction) indicator. The test itself tells whether the bacterium can ferment lactose, reduce litmus, form clots, form gas, or start peptonization.[2]
References
- ↑ Schierl, Elizabeth A.; Blazevic, Donna J. (August 1981). "Rapid Identification of Enterococci by Reduction of Litmus Milk". Journal of Clinical Microbiology 14 (2): 227–228. PMID 6895080.
- ↑ 2.0 2.1 "Litmus Milk Medium Data Sheet". Archived from the original on 15 July 2011. https://web.archive.org/web/20110715094437/http://www.pmlmicro.com/assets/TDS/455.pdf.
- ↑ "Litmus Milk Results and Meanings". http://web.clark.edu/tkibota/240/Unknowns/LitmusMilk.htm#Introduction.
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