Modified Lauryl Sulphate Tryptose Broth

Selectively enrich Cronobacter spp. from milk and milk samples using Thermo Scientific™ Oxoid™ Modified Lauryl Sulphate Tryptose Broth Base (Dehydrated). Modified Lauryl Sulphate Tryptose Broth Base was originally described by Guillaume-Gentil et al. for the selective enrichment of Cronobacter spp. The high salt concentration of the medium restricts the growth of other members of Enterobacteriaceae and the combination of vancomycin and sodium lauryl sulphate inhibits the growth of Gram-positive organisms commonly isolated in production environments.

Modified Lauryl Sulphate Tryptose Broth Base, Oxoid Composition

Modified Lauryl Sulphate Tryptose Broth, Oxoid Preparation:
Dissolve 32.3g in 500ml of distilled water. Sterilize by autoclaving at 121°C for 15 minutes. Cool to approximately 50°C, and aseptically add the contents of 1 vial of Vancomycin Supplement (5mg) (SR0247E) reconstituted as directed. Mix well and aseptically dispense into sterile containers.

Storage conditions and Shelf life
Store the dehydrated medium at 10-30°C and use before the expiry date on the label
Where possible the complete medium should be prepared on the day of testing and stored for no longer than 1 day at 0-5ºC