XLD Agar

XLD Agar is used for isolating and differentiation of Gram-negative enteric bacteria.

Principles this medium, Yeast Extract provides the nitrogenous sources and carbohydrates required for bacterial growth. Sodium Chloride supplies electrolytes and maintains osmotic equilibrium. Xylose, Lactose and Sucrose are the fermentable carbohydrates, being the former utilized by most enteric bacteria except for Shigella and Providencia spp. Upon Xylose depletion, Salmonella (but not non-pathogen Xylose fermenters) decarboxylates L-Lysine and reverts the pH acidification due to carbohydrate fermentation. Phenol Red serves as pH indicator. Sodium Thiosulfate and Ferric Ammonium Citrate detect hydrogen sulfide formation in alkaline conditions.

Item No. Brand Name Size Mfr. Item No. Unit of Measure Your Cost Purchase
XLD Agar
Criterion 500 gram C7321 Each
Add to Cart This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you'd like us to keep stock in the future In Stock
XLD Agar
Alpha Biosciences 500 gram X24-101 Each
Add to Cart 2 In Stock 2 In Stock