This is a medium for the selective isolation of Staphylococcus spp. and Streptococcus spp. primarily from clinical specimens. Based on Columbia agar base enriched with 7% horse blood the medium is made selective by the inclusion of colistin and nalidixic acid to suppress the growth of the majority of gram negative bacteria.
- Storage temperature: 2 to 8°C
- Appearance: firm gel
- Colour: cherry red
- Recommended incubation: aerobically at 37°C for 16 to 24 hours
- pH: 7.3 ± 0.2
- Plate size: 90mm
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