| Identifiers |
 |
| Product Name |
OXFORD Agar Base (Without Supplement , see List of Reagents & Supplements Ref. 6-109CASE) |
| Catalogue No. |
CM510848 |
|
Description |
Oxford Agar is derivated from the original formulation by Curtis et al, which worked a medium with a high nutritive ability as the Columbia Agar and added inhibitor agents to remove all the undesirable companion bacteria. The current formulation keep the high capacity to support growth and restrain all the gramnegative flora and most of grampositive, including yeast. Thanks to the inhibitors incorporated in the selective supplement: cycloheximide, acriflavine, colystin, phosphomicyn and ceftacidine. These inhibitors in addition to lithium chloride restrain the growth of all other bacteria except Listeria. However, selectivity is not total, but Listeria colonies are easily recognizable since as they hydrolyze esculin. Free esculetin that reacts with the ferric ions and produce a dark precipitate around the colonies, which typically present a grey-blue colour with a very dark core. |
|
Application |
Solid, selective and differential medium for the detection, enumeration and isolation of Listeria sp. According ISO standards 11290-1 and 11290-2. |