Colorex™ STEC is a chromogenic medium for the detection of enterohaemorrhagic E. coli (including serotypes O26, O111 & O157). Over the past few years there has been an increase in the number of food poisoning outbreaks where non-O157 Shiga toxin producing E. coli (STEC) have been shown to be etiological agent.
The medium contains several selective agents to reduce the level of background flora from the specimen or food sample. Positive STEC colonies exhibit a mauve colouration enabling easy interpretation amongst other Gram negative bacteria that will exhibit blue or colourless colonies, if they are able to grow on the medium. Gram positive bacteria will be inhibited.
- Storage temperature: 2 to 8°C, store in the dark
- Appearance: firm gel
- Colour: straw
- Recommended incubation: aerobically at 37°C ± 1°C for 18 to 24 hours
- pH: 6.9 ± 0.2
- Plate size: 90mm
- Fill volume: 18 to 22mL
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