امولسیون تلوریت دار زرده تخم مرغ کد 109785 سیگما

Description

Packaging

50×10 ml in Fibre case

Linkage

Replaces: 1.03785.0007

Analysis Note

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.