Selective & differential design
- Lithium chloride and potassium tellurite egg-yolk enrichment suppress background flora.
- Staphylococcus aureus forms typical grey-black, shiny, convex colonies surrounded by a clear zone, making presumptive identification fast and easy.
Ready-to-use & reliable
- Supplied as 90 mm prepared plates, 20–25 mL agar per plate.
- Triple-layer vacuum packaging protects the medium and reduces condensation and dehydration.
- Sterility and growth controls are performed: typical S. aureus growth; Escherichia coli inhibited.
- Consistent gel strength (500–650 g/cm) and controlled pH (7.0 ± 0.2 at 25 °C).
Typical composition (per litre)
- Tryptone 10.0 g; Beef extract 5.0 g; Yeast extract 1.0 g; Sodium pyruvate 10.0 g; Glycine 12.0 g; Lithium chloride 5.0 g; Agar 20.0 g; Distilled water 1 L; plus potassium tellurite egg-yolk enrichment (1 vial per 95 mL).
Storage & shelf life
- Store at 2–8 °C, protected from light.
- Shelf life: 30 days from production.
How to use
- Remove the plate from cold storage and allow it to equilibrate to room temperature.
- Transport the whole pack to the test site.
- Inoculate and incubate inverted at the specified temperature and time.
- Observe and count colonies.
Quality indicators
- Appearance: yellow, smooth, no cracks, no bubbles, opaque.
- Sterility & water retention: no growth after incubation at 30–35 °C for 2 days; no obvious dehydration.
- Growth: S. aureus – typical colonies, good growth; E. coli – inhibited.
Note
- For laboratory/professional use only. Single-use product; autoclave before disposal.
- Do not use plates that are cracked, dry or contaminated.
- Re-seal any unused plates and return to cold storage promptly.
Packaging
- 90 mm × 10 plates per pack.
