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1097 Yeast Extract Soy Agar (YESA), Condalab

1097 Condalab

Yeast Extract Soy Agar (YESA) is a highly nutritious, non-selective medium used for the cultivation and maintenance of a wide variety of microorganisms, including fastidious bacteria, yeasts, and molds. It is particularly valued in the pharmaceutical and cosmetic industries for microbial limit testing and for the subculturing of strains during quality control processes.

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The medium combines the rich nutritional profiles of both animal and plant-based proteins. The Pancreatic Digest of Casein and Soy Peptone provide a balanced array of nitrogen, amino acids, and long-chain peptides. The addition of Yeast Extract further enriches the medium with B-complex vitamins, minerals, and growth factors. Sodium Chloride is included to maintain osmotic equilibrium, and Bacteriological Agar provides the solid matrix for colony development. This combination makes it a superior alternative to standard Tryptic Soy Agar (TSA) when higher recovery rates of stressed or demanding organisms are required.

Advantages

  • Enhanced Recovery: The inclusion of Yeast Extract provides essential growth factors that significantly improve the recovery of fastidious organisms.
  • Dual Peptone Source: Combines casein and soy peptones to ensure a broad spectrum of nutrient availability for diverse microbial groups.
  • Versatile Application: Suitable for the growth of bacteria, yeasts, and molds, making it an excellent "general-purpose" medium for industrial labs.
  • Maintenance of Cultures: Provides a stable environment for the preservation and subculturing of stock strains without losing viability.
  • Standardized Reliability: Formulated to provide consistent results in routine microbiological analysis and quality control.

Technical specifications

Catalogue number 1097
Brand Condalab
Application General-purpose cultivation of fastidious microorganisms
Typical Composition (g/L) Pancreatic Digest of Casein (15.0); Soy Peptone (5.0); Yeast Extract (5.0); Sodium Chloride (5.0); Bacteriological Agar (15.0)
Final pH (at 25 °C) 7.3 ± 0.2
Preparation 45.0 g/L
Storage Temperature 2 – 25 °C

Available packaging options

1097-500G 500 g plastic bottle
Brand Condalab
Pack size 500 g