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XLT4 Agar (XLT4)


XLT Agar (Xylose Lysine Tergitol-4) Is a selective culture medium for the isolation and identification of Salmonella from food and environmental samples. It is similar to XLD agar; however, the agar is supplemented with the surfactant, Tergitol 4, which causes inhibition of Proteus spp. and other non-Salmonella. Successful growth of Salmonella will result in growth of red colonies with a black center.


Enzymatic Digest of Animal Tissue 4.6g

Xylose 5g

L-Lysine 5g

Lactose 7.5g

Sucrose 7.5g

Sodium Chloride 5g

Yeast Extract 3g

Phenol Red 0.08g

Ferric Ammonium Citrate 0.8g

Sodium Thiosulfate 6.8g

Agar 15g

Final pH: 7.4 ± 0.2 at 25°C


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