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Specifications

Appearance pale yellow emulsion

Sterility test sterile

Typical composition: Sterile egg-yolk 200 ml; NaCl 4.25 g; potassium tellurite 2.1 g; distilled water to give a final volume of 1000 ml.

Egg-yolk Tellurite Emulsion tested in BAIRD-PARKER-Agar Art. 1.05406.

Inoculum on reference medium

- Staphylococcus aureus ATCC 25923 (WDCM 00034)

10 - 100

- Staphylococcus aureus ATCC 6538 (WDCM 00032) 10 - 100

Inoculum

- Escherichia coli ATCC 25922 (WDCM 00013)

> 10⁴

- Escherichia coli ATCC 8739 (WDCM 00012) > 10⁴

- Staphylococcus saprophyticus ATCC 15305 (WDCM 00159) > 10⁴

- Staphylococcus epidermidis ATCC 12228 (WDCM 00036) > 10⁴

Recovery on test medium

- Staphylococcus aureus ATCC 25923 (WDCM 00034)

≥ 70 %

- Staphylococcus aureus ATCC 6538 (WDCM 00032) ≥ 70 %

Growth

- Escherichia coli ATCC 25922 (WDCM 00013)

no growth

- Escherichia coli ATCC 8739 (WDCM 00012) no growth

- Staphylococcus saprophyticus ATCC 15305 (WDCM 00159) poor to fair

- Staphylococcus epidermidis ATCC 12228 (WDCM 00036) poor to fair

Colony colour

- Staphylococcus aureus ATCC 25923 (WDCM 00034)

black

- Staphylococcus aureus ATCC 6538 (WDCM 00032) black

- Staphylococcus saprophyticus ATCC 15305 (WDCM 00159) black-grey

- Staphylococcus epidermidis ATCC 12228 (WDCM 00036) black-grey

Clear zones

- Staphylococcus aureus ATCC 25923 (WDCM 00034)

+

- Staphylococcus aureus ATCC 6538 (WDCM 00032) +

- Staphylococcus saprophyticus ATCC 15305 (WDCM 00159) -

- Staphylococcus epidermidis ATCC 12228 (WDCM 00036) -

Incubation: 24 - 48 hrs. at 37°C, E.coli: 48 hrs. Reference: Tryptic soy agar.