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Amyl Media Amyl Media : Microbiological Media Supplies

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Egg Yolk Tellurite is a tellurite, egg yolk emulsion prepared for use with Baird-Parker Agar Base for the detection and enumeration of coagulase positive staphylococci.


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Egg yolk and tellurite are responsible for the differentiation of coagulase positive staphylococci.

Lipolysis and proteolysis of egg yolk result in the characteristic ring of opacity within a clear zone.

The reduction of tellurite to tellurium produces colonies with varying degrees of blackening (grey-black to black). The two characteristic features serving as an index for a positive coagulase reaction.

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