Description
Chromatic E. coli O157 is a selective chromogenic medium for isolating and differentiating Escherichia coli O157 from clinical and food samples.
Sodium deoxycholate inhibits Gram-positive bacteria and the chromogenic system produces mauve to mauve-purple colonies for presumptive E. coli O157.
Samples or pre-enrichment cultures are streaked onto the medium and incubated aerobically at 37°C for 18–24 hours. Presumptive colonies require immunoserological confirmation.
