XLD Agar- Composition, Principle, Preparation, Results, Uses


XLD Agar is a type of culture medium that is used in microbiology to isolate and identify certain bacteria that cause infections in humans and animals. The name XLD stands for Xylose Lysine Deoxycholate, which are the main ingredients of the medium. XLD Agar is designed to selectively grow Gram-negative bacteria, especially Salmonella and Shigella species, while inhibiting the growth of Gram-positive bacteria and most other Gram-negative bacteria. XLD Agar also allows the differentiation of Salmonella and Shigella from other bacteria based on their ability to ferment sugars, decarboxylate lysine, and produce hydrogen sulfide.