EO Labs Colorex O157 CT - 10 x 90mm Plates

This medium replaces the conventional Sorbitol MacConkey Agar that is reputed for high levels of false positives and the difficulty of colonial interpretation and differentiation. Colorex™ O157 is a chromogenic medium with a very high specificity (98% according to K.A. Bettelheim, 1998 J.Appl.Microbiol.85:425-428) for E. coli O157. To reduce the level of background flora, the medium is made selective by the addition of cefixime and potassium tellurite. Positive colonies exhibit a mauve colouration enabling easy interpretation amongst blue or colourless colonies of other bacteria.

• Storage conditions: 2 to 8°C, store in the dark
• Appearance: firm gel
• Colour: buff
• Recommended incubation: aerobically at 37°C ± 1°C for 18 to 24 hours
• pH: 7.2 ± 0.2
• Plate size: 90mm
• Fill volume: 18 to 22mL