Lauryl Tryptose (LST) Broth is used for the detection of coliform bacteria in water and wastewater. Lauryl Tryptose Broth is not intended for use in the diagnosis of disease or other conditions in humans. Lauryl Tryptose Broth is a selective medium for the detection of coliforms in water, dairy products and other foods. The American Public Health Authority (APHA) recommend Lauryl Tryptose Broth for the Most Probable Number Presumptive Test of coliforms in waters, effluent or sewage and as a confirmation test of lactose fermentation with gas production from milk samples and for the detection of coliforms in foods. Lauryl Tryptose Broth is prepared according to the formulation of Mallmann and Darby. Mallmann and Darby showed that tryptose at a concentration of 2% increased the early logarithmic growth phase when compared to meat peptone.

These researchers added phosphate buffers and sodium chloride, which improved gas production by "slow lactose fermenting" organisms. Sodium lauryl sulfate was incorporated as a selective agent for the inhibition of non-coliform organisms. This medium can also be used with the addition of MUG (4- methylumbelliferyl-β-D-glucuronide) according to the ISO Standard 11866-2 to give enhanced detection of Escherichia coli.

These detectable Trace-It® pens are detectable by in-line metal detection systems and x-ray inspection systems, they are compliant with EU and FDA food contact legislation and the ink conforms with ISO 12757-2 for documentary use. Detectable by in-line metal detection systems and x-ray inspection systems Available in blue and red bodies A choice of blue, black, red and green inks available.

The ink conforms with:

• ISO 12757-2 Strong, durable, shatter resistant, and chemically resistant
• Compliant with EU and FDA, including mandatory EU migration test standards
• Can be used as part of HACCP and BRC procedures
• Write out length of 9,000m +/- 30% Displays due diligence in the prevention of foreign body contamination

Neogen® Swab-Sampler with 10 mL Letheen Broth is a convenient and quick collection device for environmental sampling and testing over small surface areas.

Sample collection is easy with the attached swab. The vial provides ample headspace for sample addition and vortexing to release organisms from the swab. This sampling device is decontaminated through gamma irradiation for long shelf life. The Neogen® Swab-Sampler is made in the USA with globally sourced materials. The Hazard Analysis Critical Control Point (HACCP) approach is the most widely accepted food safety management protocol worldwide. Sample collection products from Neogen® are a crucial part of this approach to identify potential food-borne hazards and pinpoint where they reside. Portability, stable enrichment media, and easy-to-handle swabs and sponges are designed to test for a wide variety of potential hazards and deliver accurate results. They are engineered to safely gather, hold, and secure contents from the collection site to the lab without leaking or compromising the sample.

The primary use of Letheen Broth is to neutralise the bactericidal action of quaternary ammonium compounds and for determining the phenol coefficient of cationic surfactants. Letheen Broth is also used in hygiene swabbing practices where neutralizing quaternary ammonium compounds are required.

pH 4.01 Buffer Solution (Red) packed in 480 ml durable plastic bottles, economical and convenient for laboratory use.