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XLD

XLD is a brand associated with Xylose Lysine Deoxycholate (XLD) Agar, a selective and differential culture medium widely used in microbiology for the isolation and identification of Salmonella and Shigella species. The medium was originally developed in the 1960s to improve the recovery of these enteric pathogens from clinical and food samples. XLD Agar works by inhibiting Gram-positive bacteria and allowing Gram-negative enteric bacilli to grow, while differentiating lactose fermenters, sucrose fermenters, and xylose fermenters from non-fermenters. Salmonella colonies typically appear red with black centers due to hydrogen sulfide production, while Shigella colonies appear red without black centers. The brand XLD encompasses a range of formulations and packaging formats to suit different laboratory workflows. 3G Electric supplies XLD microbiology media as part of its industrial and laboratory equipment portfolio. The product line includes XLD Agar in powder form for laboratories that prepare their own plates, as well as ready-to-use solid plates for convenience and consistency. Powder formats are available in various sizes, such as 500 g and 10 kg, packaged in bottles. Solid plates are supplied in standard 100 x 15 mm dimensions, with a shelf life of 90 days. Powder products typically have a 2-year shelf life when stored properly. These products are manufactured under controlled conditions to ensure consistent performance and are identified by manufacturer part numbers for traceability. 3G Electric supports the XLD line by offering multiple SKUs, logistics coordination, and technical documentation to help procurement and laboratory teams select the appropriate format and quantity. The media are suitable for use in clinical, food, and environmental microbiology laboratories. When selecting XLD media, buyers should consider the required format (powder or prepared plates), the quantity needed, and the shelf life constraints. 3G Electric can provide quotes and availability information for global delivery.

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About XLD

XLD is a brand associated with Xylose Lysine Deoxycholate (XLD) Agar, a selective and differential culture medium widely used in microbiology for the isolation and identification of Salmonella and Shigella species. The medium was originally developed in the 1960s to improve the recovery of these enteric pathogens from clinical and food samples. XLD Agar works by inhibiting Gram-positive bacteria and allowing Gram-negative enteric bacilli to grow, while differentiating lactose fermenters, sucrose fermenters, and xylose fermenters from non-fermenters. Salmonella colonies typically appear red with black centers due to hydrogen sulfide production, while Shigella colonies appear red without black centers. The brand XLD encompasses a range of formulations and packaging formats to suit different laboratory workflows. 3G Electric supplies XLD microbiology media as part of its industrial and laboratory equipment portfolio. The product line includes XLD Agar in powder form for laboratories that prepare their own plates, as well as ready-to-use solid plates for convenience and consistency. Powder formats are available in various sizes, such as 500 g and 10 kg, packaged in bottles. Solid plates are supplied in standard 100 x 15 mm dimensions, with a shelf life of 90 days. Powder products typically have a 2-year shelf life when stored properly. These products are manufactured under controlled conditions to ensure consistent performance and are identified by manufacturer part numbers for traceability. 3G Electric supports the XLD line by offering multiple SKUs, logistics coordination, and technical documentation to help procurement and laboratory teams select the appropriate format and quantity. The media are suitable for use in clinical, food, and environmental microbiology laboratories. When selecting XLD media, buyers should consider the required format (powder or prepared plates), the quantity needed, and the shelf life constraints. 3G Electric can provide quotes and availability information for global delivery.

Common Applications

  • Clinical microbiology — XLD Agar plates (100 x 15 mm) for isolation of Salmonella and Shigella from stool samples
  • Food safety testing — XLD Agar powder (500 g) for detection of Salmonella in food products
  • Environmental monitoring — XLD Agar powder (10 kg) for screening water and surface samples for enteric pathogens
  • Pharmaceutical quality control — XLD Agar plates for microbial limit testing of non-sterile products
  • Veterinary diagnostics — XLD Agar powder for isolation of Salmonella from animal specimens
  • Research laboratories — XLD Agar in powder or plate format for studies on enteric bacterial pathogenesis

Frequently asked questions

Common questions about XLD from 3G Electric.

What is XLD Agar used for in microbiology?

XLD Agar is a selective and differential medium used for the isolation and identification of Salmonella and Shigella species from clinical, food, and environmental samples. It inhibits Gram-positive bacteria and differentiates enteric pathogens based on xylose fermentation, lactose fermentation, sucrose fermentation, and hydrogen sulfide production. Salmonella colonies appear red with black centers, while Shigella colonies appear red without black centers. This medium is widely used in public health and food safety testing.

What formats of XLD media does 3G Electric supply?

3G Electric supplies XLD Agar in both powder and prepared plate formats. Powder formats include 500 g and 10 kg bottles, with a 2-year shelf life. Prepared plates are available in 100 x 15 mm dimensions, with a 90-day shelf life. These options allow laboratories to choose between preparing their own plates or using ready-to-use plates for convenience and consistency.

How should XLD Agar powder be stored and handled?

XLD Agar powder should be stored in a cool, dry place, away from direct light, and kept tightly sealed to prevent moisture absorption. The product has a shelf life of 2 years from the date of manufacture when stored properly. Before use, check for clumping or discoloration. Prepare the medium according to the manufacturer's instructions, typically by suspending the powder in purified water, heating to boiling, and cooling before pouring plates. Do not autoclave XLD Agar, as excessive heat can degrade the medium.

What is the shelf life of XLD Agar plates?

XLD Agar plates supplied by 3G Electric have a shelf life of 90 days from the date of manufacture when stored at 2-8°C. Proper storage is essential to maintain performance. Plates should be used before the expiration date and inspected for signs of dehydration, contamination, or discoloration before use. For best results, allow plates to come to room temperature before inoculation.

Can XLD Agar differentiate Salmonella from Shigella?

Yes, XLD Agar differentiates Salmonella from Shigella based on colony appearance. Salmonella colonies typically appear red with black centers due to hydrogen sulfide production, while Shigella colonies appear red without black centers. Other enteric bacteria may produce yellow or colorless colonies. This differentiation aids in the presumptive identification of these pathogens, though confirmatory tests are required for definitive identification.

Does 3G Electric supply XLD products?

Yes — 3G Electric (S) Pte. Ltd. supplies XLD products. We stock the XLD catalog and supply genuine factory-original products with full manufacturer warranty and technical support.