Xylose Lysine Deoxycholate agar, commonly referred to as XLD agar, is a specialized growth medium with selective properties, employed for the isolation of Salmonella and Shigella species from clinical specimens and food products. XLD agar is particularly recommended for the identification of Enterobacteriaceae and is used in microbiological assessments of various items such as food, water, and dairy products. Its unique formulation effectively prevents the excessive growth of other microorganisms, ensuring that Salmonella and Shigella can be isolated and identified without interference. XLD Agar is also part of the media utilized in the Microbial Limit Tests as stipulated in the United States Pharmacopeia (USP) and European Pharmacopoeia (EP) standards.