Proteose Peptone Rice Agar

Proteose Peptone Rice Agar

This is a medium for the isolation and identification of Group B streptococci. The principal of the medium is based on the ability of group B streptococci to produce unique orange/red pigmented colonies when incubated anaerobically, particularly on media containing starch products. This medium is non-selective so other organisms will grow on this medium but they do not produce the characteristic pigment.

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Organisms Ref. No Result
Streptococcus agalactiae ATCC 12386 Orange colonies
Streptococcus pyogenes NCTC 12696 Grey/white colonies