MacConkey Agar

This is a selective medium for the isolation and differentiation of bile tolerant gram-negative (enteric) and gram-positive (staphylococci and enterococci) organisms and has uses in all areas of bacteriology. It has the disadvantage that many strains of Proteus spp will spread on it and for this reason MacConkey Agar without Salt may be preferred.

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Product Description

Organisms Ref. No Result
Staphylococcus aureus NCTC 12981 Small pink / orange colonies
Shigella sonnei NCTC 8574 Translucent colonies
Escherichia coli NCTC 12241 Pink / red colonies