Tryptone Soya Yeast Extract Agar

Tryptone Soya Yeast Extract Agar is a rich nutritive growth medium formulated to support the growth of Listeria monocytogenes. Casein enzymic hydrolysate and papaic digest of soyabean meal provide essential growth nutrients, including amino acids and other nitrogenous substances necessary for microbial growth. Yeast extract serves as the source of B-complex vitamins and other nutritive compounds such as amino acids, further enriching the medium. Dextrose acts as a fermentable sugar and primary energy source, while sodium chloride maintains osmotic balance. Dipotassium hydrogen phosphate functions as a buffering agent, ensuring stable pH conditions throughout incubation.

Tryptone Soya Yeast Extract Agar is widely used in microbiological laboratories for the isolation, cultivation, and enumeration of Listeria monocytogenes from food, environmental, clinical, and pharmaceutical samples. The medium is commonly employed in quality control applications across the food and beverage, pharmaceutical, and environmental monitoring industries, where reliable and consistent microbial growth is essential for accurate results.

Features:

• High-Quality Standards: NutriSelect^® Plus powdered culture media are made from carefully selected raw materials, ensuring consistent quality.
• Wide Range of Applications: Suitable for various microbiological needs, including academic research, food and beverage testing, and pharmaceutical applications.
• Regulatory Compliance: Products meet industry standards and are compliant with ISO 9001 quality assurance.
• Innovative Formulations: Includes novel media types such as non-animal-derived alternatives, synthetically defined media, and chromogenic media.

Benefits:

• Convenience and Safety: Easy-to-use powdered format with minimal clumping and excellent solubility, even in warm or humid conditions.
• Sustainability: Reduced risks associated with fine dust and toxic substance inhalation, ensuring a safer work environment.
• Extended Shelf Life: Products have a prolonged shelf life of up to five years.
• High Reproducibility: Ensures consistent results across batches, exceeding regulatory demands.
• Comprehensive Portfolio: A vast selection of over 350 products tailored to meet diverse microbiological testing needs.

Suspend 51 g in 1000 ml distilled water. Boil gently to dissolve the medium completely. Sterilize by autoclaving at 121 °C for 15 min.

We offer two media types: the superior granulated GranuCult^® and the cost-efficient powdered NutriSelect^® culture media, depending on your needs.
The designations basic, plus, or prime are added to indicate the quality control level, from basic quality control to standard QC plus to prime for full regulatory compliance.

GRANUCULT is a registered trademark of Merck KGaA, Darmstadt, Germany

NutriSelect is a registered trademark of Merck KGaA, Darmstadt, Germany