Oxoid™ XLD Agar 500g

Oxoid™ XLD Agar (500g) is a selective and differential medium used for the isolation and differentiation of enteric Gram-negative bacteria, particularly Salmonella and Shigella species, from clinical, environmental, and food samples. XLD (Xylose Lysine Deoxycholate) Agar contains xylose and lactose for carbohydrate fermentation, along with sodium thiosulphate and ferric ammonium citrate to detect hydrogen sulphide (H2S) production. The medium also contains deoxycholate to inhibit Gram-positive organisms, allowing for the growth of enteric pathogens.

Key Features:

• Form: Dehydrated powder
• Weight: 500g
• Application: Isolation and differentiation of Salmonella and Shigella species
• Composition: Contains xylose, lactose, and other sugars for fermentation, sodium thiosulphate, ferric ammonium citrate for H2S detection, and deoxycholate for selective inhibition of Gram-positive organisms
• Preparation: Suspend 49g of the dehydrated medium in 1 litre of distilled water, mix thoroughly, and autoclave at 121°C for 15 minutes
• Yield: Approximately 10 litres of prepared medium
• Storage: Store the dehydrated medium at 10–30°C, protected from moisture and light
• Compliance: Suitable for use in microbiological testing protocols for the isolation and differentiation of enteric pathogens

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