XLD Agar – Selective Medium for Salmonella & Shigella Isolation
Precision-Formulated XLD Agar – Gold Standard for Enteric Pathogen Isolation
Achieve definitive identification of Salmonella and Shigella species with our selective XLD Agar – the chromogenic medium of choice for clinical diagnostics, food safety testing, and environmental monitoring. Developed with triple sugar system and deoxycholate inhibitor, this differential medium delivers unmistakable colony morphology for reliable pathogen isolation per ISO 6579 and FDA BAM standards.
Critical Applications:
✔️ Salmonella Detection – Food/Water/Clinical specimens
✔️ Shigella Isolation – Stool culture processing
✔️ Pharmaceutical QC – Raw material contamination screening
✔️ Environmental Monitoring – Swab testing in processing areas
Differential Formula Components (per liter):
| Component | Quantity |
|—————————-|———-|
| Yeast Extract | 3.0g |
| L-Lysine | 5.0g |
| Xylose | 3.5g |
| Lactose | 7.5g |
| Sucrose | 7.5g |
| Sodium Deoxycholate | 2.5g |
| Ferric Ammonium Citrate | 0.8g |
| Sodium Thiosulfate | 6.8g |
| Sodium Chloride | 5.0g |
| Phenol Red | 0.08g |
| Purified Agar | 13.5g |
pH: 7.4 ± 0.2 (25°C)
Validated Preparation Protocol:
Dissolve 55.2g in 1L purified water
Boil 1 minute with constant stirring
Cool to 50-55°C (DO NOT AUTOCLAVE)
Pour Plates immediately
Dry: Leave plates uncovered for 20 minutes
