Merck, 1098770010, OGYE selective supplement

General description
OGYE Selective Supplement contains oxytetracycline in lyophilized form. It suppresses the growth of accompanying bacterial flora during culturing yeasts and molds.
Application
OGYE Selective Supplement is an additive used during the preparation of OGYE Selective Agar (Base) (1.05978) for enumeration of yeasts and molds in food.
Analysis Note
Tested in OGYE-agar base art. no. 1.05978.
Recovery on test medium
- Candida albicans ATCC 10231 (WDCM 00054):
≥ 50 %
- Saccharomyces cerevisiae ATCC 9763 (WDCM 00058): ≥ 50 %
- Aspergillus brasiliensis (formerly A. niger) ATCC 16404 (WDCM 00053): ≥ 50 %
- Penicillium aurantiogriseum ATCC 16025: ≥ 50 %
Growth
- Bacillus subtilis ATCC 6633 (WDCM 00003):
none
- Escherichia coli ATCC 25922 (WDCM 00013): none
Incubation: 3 up to 5 days; 28 °C; aerobic.
Other Notes
Replaces: 1.09877.0017