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Merck
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Key Documents

1.46751

Millipore

Readyplate XLD Agar acc ISO 6579

For isolation and differentiation of Salmonella, box of 20 plates, plate diam. 90 mm

别名:

Xylose Lysine Deoxycholate Agar

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About This Item

分類程式碼代碼:
41106217
NACRES:
NA.74

agency

APHA
ISO 19250
ISO 6579

品質等級

形狀

solid

特點

ready-to-use

包裝

box of 20 plates

製造商/商標名

ReadyPlate

儲存條件

(Store dry and tightly closed)

板直徑

90 mm

顏色

red

應用

food and beverages
industrial qc
microbiology

儲存溫度

15-25°C

適合性

Salmonella spp.

一般說明

XLD agar is a selective agar that enables the identification of Salmonella species over other bacteria. This medium relies on three indicator systems:
  1. Degradation of xylose, lactose, and sucrose to acid causes phenol red to change its color to yellow.
  2. Production of hydrogen sulfide is indicated by thiosulfate and iron (III) salt, which react to form a precipitate of black iron sulfide in the colonies.
  3. The appearance of a purple coloration around the colonies due to an increase in pH indicates bacteria that decarboxylate lysine to cadaverine.
These reactions can proceed simultaneously or successively and may cause the pH indicator to exhibit various shades of color, or it may change its color from yellow to red on prolonged incubation. The culture medium is moderately selective thus, the growth of unwanted organisms is suppressed, while sought bacteria can be tentatively grouped by reading the net effect of carbohydrate dissimilation, lysine decarboxylation, and the formation of hydrogen sulfide leading to black colonies. Agar is the solidifying agent.

應用

ReadyPlate XLD Agar plates are suitable for isolation and differentiation of Salmonella from food and animal feed, water, and other materials.

法律資訊

READYPLATE is a trademark of Merck KGaA, Darmstadt, Germany

儲存類別代碼

13 - Non Combustible Solids

水污染物質分類(WGK)

WGK 2

閃點(°F)

Not applicable

閃點(°C)

Not applicable


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实验方案

Specifies a horizontal method for the detection of Salmonella spp. in the food production chain.

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