| 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
|
Irritant
