Baird-Parker Agar with Egg Yolk Tellurite
Baird-Parker Agar with Egg Yolk Tellurite and Potassium Tellurite is a selective medium for the detection and enumeration of Staphylococcus aureus in animal origin biological samples, pharmaceutical products, cosmetics, foods, and water. The typical composition is that defined in the food chain microbiology directives NF EN ISO 6888-1 and NF EN ISO 6888-3.
Principles
- Growth of staphylococci is favored by sodium pyruvate and glycine
- Accompanying microflora is inhibited by lithium chloride and potassium tellurite (added extemporaneously), as well as a high concentration of glycine
- Addition of sulfamethazine (optional) after autoclaving inhibits most Proteus and thus limits the invasion of the medium by this species
- Enrichment with egg yolk aids in identification by showing the action of lecithinase
- Staphylococcus aureus presents black or gray colonies (due to the reduction of tellurite to telluride), surrounded by clearing zones in the cloudy egg yolk medium
- In principle, other microorganisms are inhibited. However, it is possible to observe brown or greenish micrococci, white yeast colonies, or brown Bacillus or
| Item No. | Brand Name | Mfr. Item No. | Size | Your Cost | Purchase |
|---|---|---|---|---|---|
|
EGG YOLK TELLURITE 50ML
3120-64
|
BIOKAR Diagnostics | BS06008 | 50 mL x 10 vials |
$139.93
|