Oxford Listeria Selective Supplement is a mixture of four antibiotics and a dye in lyophilized form. It inhibits the growth of accompanying bacteria in the selective cultivation of Listeria monocytogenes.

Supplement tested in Oxford Listeria selective agar (base) art. no. 1.07004.

Recovery on test medium

- Listeria monocytogenes ATCC 19111 (WDCM 00020):

≥ 70 %

- Listeria monocytogenes ATCC 13932 (WDCM 00021): ≥ 70 %

- Listeria monocytogenes ATCC 35152 (WDCM 00109): ≥ 70 %

- Listeria innocua ATCC 33090 (WDCM 00017): ≥ 70 %

- Enterococcus faecalis ATCC 19433 (WDCM 00009): ≤ 0.01 %

- Escherichia coli ATCC 25922 (WDCM 00013): ≤ 0.01 %

Black zone

- Listeria monocytogenes ATCC 19111 (WDCM 00020):

+

- Listeria monocytogenes ATCC 13932 (WDCM 00021): +

- Listeria monocytogenes ATCC 35152 (WDCM 00109): +

- Listeria innocua ATCC 33090 (WDCM 00017): +

Growth

- Staphylococcus aureus ATCC 25923 (WDCM 00034):

inhibited

- Candida albicans ATCC 10231 (WDCM 00054): inhibited

Incubation: 48 hrs.; 35 °C; aerobic.

Reference: Tryptic soy agar.