XLT Agar (Xylose Lysine Tergitol-4) is a selective culture medium for the isolation and identification of salmonellae 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-Salmonellae. Successful growth of Salmonella will result in growth of red colonies with a black centre. XLT Agar contains:
Proteose Peptone 1.6g/l Yeast extract 3g/l L-Lysine 5g/l Xylose 3.75g/l Lactose 7.5g/l Sucrose 7.5g/l Sodium chloride 5g/l Sodium thiosulphate 6.8g/l Ferric ammonium citrate 0.8 mg/l Phenol red 0.08g/l Agar 18g/l Tergitol-4 4.6mL/l
See also Agar plate XLD agar R2a agar MRS agar
References
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