RTU Media Plate XLD (Xylose-lysine-deoxycholate) Agar - LI EP+USP, 0152E-120P, 90 mm ICR-Settle Plate filled with 30 ml, 120 pc/PAK

Application: Isolation of Salmonella and Shigella
Packaging: 90 mm settle plates with 30 ml filling volume (20 or 120 plates per box)for long incubation (LI)
Synonym: Xylose Lysine Deoxycholate Agar

Xylose-lysine deoxycholate (XLD) agar is a selective growth medium for the isolation of Salmonella and Shigella species (Taylor and Schelbert, 1971), introduced by Taylor (1965). It is based on the use of the selectively inhibitory component sodium deoxycholate and three indicator systems, i.e., xylose, lactose, and sucrose, in combination with phenol red. The degradation of xylose, lactose, and sucrose to acid causes phenol red to change to yellow. Sodium thiosulfate and ferric salt react to form a precipitate of black iron sulfide in the colonies, indicating the production of hydrogen sulfide. Bacteria that decarboxylate lysine to cadaverine can be identified by the purple coloration around the colonies due to an increase in pH. These reactions can occur simultaneously or sequentially. This causes the pH indicator to display different colors, or it may change color from yellow to red during extended incubation. Due to its sodium deoxycholate content, the culture medium has a weak inhibitory effect on other microorganisms.

Storage Temperature +15°C up to +25°C.