Neogen® Letheen Agar Base Modified without Tween
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Letheen Agar Base Modified (without Tween) is used with Tween 80 (Polysorbate 80) for the isolation of microorganisms from cosmetics in a laboratory setting. Letheen Agar Base Modified is not intended for use in the diagnosis of disease or other conditions in humans.
In 1948, Weber and Black described the value of a highly nutritional solid medium containing neutralizing agents for quaternary ammonium compounds in sanitizers. The addition of Lecithin and Tween 80 (Polysorbate 80) to Tryptone Glucose Extract (TGE) Agar resulted in a medium that effectively neutralizes quaternary ammonium compounds in testing of germicidal activity. Total neutralization of disinfectants is critical. Disinfectant residues can result in a false negative (no-growth) test.
Letheen Agar Base Modified is based on the formula described in FDA Bacteriological Analytical Manual, and a modification of Letheen Agar Base. Letheen Agar Base Modified is recommended by the FDA for use in the microbiological testing of cosmetics.
| Specifications | ||
|---|---|---|
| Brand | Neogen® Culture Media | |
| Analyte | Non-selective | |
| Platform | Dehydrated Culture Media | |
| Mass | 500 g | |
| Grams per Liter | 52.10 | |
| Liters per 500 g | 10.00 | |
| Plates per 500 g | 520.00 | |
| Package Dimensions | 4.60 in x 2.90 in x 8.60 in | |
| Package Weight | 1.35 lb | |
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