Base tested with Oxford-Listeria-selektiv-supplement art. no. 1.07006. |
Appearance (clearness) | clear |
Appearance (color) | blueish-brown to greenish-brown |
pH-value (25 °C) | 6.8 - 7.2 |
Growth promotion test in accordance with the current version of DIN EN ISO 11133. |
Inoculum on reference medium (Listeria monocytogenes ATCC 35152 (WDCM 00109)) | |
Inoculum on reference medium (Listeria monocytogenes ATCC 13932 (WDCM 00021)) | |
Inoculum on reference medium (Listeria innocua ATCC 33090 (WDCM 00017)) | |
Colony count (Listeria monocytogenes ATCC 35152 (WDCM 00109)) | |
Colony count (Listeria monocytogenes ATCC 13932 (WDCM 00021)) | |
Colony count (Listeria innocua ATCC 33090 (WDCM 00017)) | |
Recovery on test medium (Listeria monocytogenes ATCC 35152 (WDCM 00109)) | ≥ 50 |
Recovery on test medium (Listeria monocytogenes ATCC 13932 (WDCM 00021)) | ≥ 50 |
Recovery on test medium (Listeria innocua ATCC 33090 (WDCM 00017)) | ≥ 50 |
Growth Escherichia coli ATCC 25922 (WDCM 00013) | total inhibition |
Growth(Escherichia coli ATCC 8739 (WDCM 00012)) | total inhibition |
Growth (Staphylococcus aureus ATCC 25923 (WDCM 00034)) | partial inhibition |
Growth (Candida albicans ATCC 10231 (WDCM 00054)) | partial inhibition |
Black zone (Listeria monocytogenes ATCC 35152 (WDCM 00109)) | black zone |
Black zone (Listeria monocytogenes ATCC 13932 (WDCM 00021)) | black zone |
Black zone (Listeria innocua ATCC 33090 (WDCM 00017)) | black zone |
Incubation: up to 48 hours at 35 ± 1 °C, aerobic A recovery rate of 50 % is equivalent to a productivity value of 0.5. The indicated colony counts result from the sum of a triple determination. Reference media: Tryptic Soy Agar
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