Thermo Scientific™ XLT4 Agar

Description

• Selectively recover Salmonella species other than Salmonella enterica serovar Typhi with Thermo Scientific™ Remel™ XLT4 Agar Monoplate
• XLT4 (Xylose-Lysine-Tergitol 4) Agar was developed by Miller and Tate to selectively screen samples contaminated with enteric organisms for the presence of Salmonella 1
• They found that XLT4 Agar completely inhibits competing enteric organisms
• Mallinson et al
• reported XLT4 Agar demonstrated significant improvements over traditionally used differential media for the detection of Salmonella from raw red and white meat samples and poultry litter 2
• Salmonella is a rod-shaped, gram-negative facultative anaerobe that belongs to the family Enterobacteriaceae and is one of the most commonly isolated foodborne pathogens found predominantly in poultry, eggs and dairy products
• Numerous Salmonella serotypes have been identified, majority of which belong to Salmonella enterica subsp
• enterica , and can cause serious, at times life-threatening, infections in humans
• XLT4 Agar Monoplate is a solid medium that is used for selective and differential recovery of non-typhi Salmonella species from clinical specimens
• Easy-to-use – Convenience of prepared media
• Selective – Selective agent Tergitol 4 reduces the growth of non-salmonellae enteric gram-negative bacilli
• Easy-to-differentiate – H 2 S-positive organisms like salmonellae produce black-yellow colonies
• Lysine-negative organisms e.g., Escherichia coli , Citrobacter , and Proteus spp
• produce yellow colonies
• XLT4 Agar Monoplate contains meat peptone and yeast extract that supply nitrogenous compounds, amino acids and vitamins necessary for bacterial growth
• Xylose is the carbohydrate source
• Lysine helps to isolate salmonellae based on their ability to decarboxylate lysine and produce an alkaline pH
• Lactose and sucrose are added in excess to prevent colonies of lysine-positive coliforms from reverting to alkaline conditions
• Sodium thiosulfate is a sulfur source and ferric ammonium citrate is an indicator of H 2 S-production
• Tergitol 4 acts as a selective agent and enhances the specificity and sensitivity of Salmonella detection and reduces the growth of non-salmonellae enteric gram-negative bacilli
• Not all products are available for sale in all territories
• Please inquire
• Remel™ and Oxoid™ products are now part of the Thermo Scientific brand.