Sigma-Aldrich MGYP Agar with Copper, suitable for microbiology, NutriSelect® Plus

Selective Medium for Isolation of Wild Yeasts in Brewing and Fermentation Microbiology

MGYP Agar with Copper, from the NutriSelect® Plus product line by Sigma-Aldrich, is a non-sterile, powdered culture medium specifically formulated for the isolation and cultivation of wild yeasts in the brewing industry. The addition of cupric sulfate enhances selectivity, helping to differentiate and recover spoilage yeasts such as Candida, Pichia, Saccharomyces, and Zygosaccharomyces species from complex beer and fermentation samples.

Ideal for use in food and beverage microbiology, this medium supports routine monitoring of yeast contaminants in raw materials, in-process brews, and final products.

Composition (per liter)

Product Details

Suitability

• Candida spp.
• Pichia spp.
• Saccharomyces spp.
• Zygosaccharomyces spp.

Applications

• Isolation of wild and spoilage yeasts in beer and fermentation
• Microbiological control in brewing, beverage, and food industries
• Routine quality testing of yeasts in raw ingredients and finished products
• Monitoring of fermentative microbial populations in production environments

Preparation Instructions

1. Suspend 41.4 g of medium in 1,000 mL of distilled water.
2. Heat to boiling with frequent agitation until completely dissolved.
3. Autoclave at 121 °C (15 psi) for 15 minutes.
4. Cool to 45–50 °C and pour into sterile Petri dishes.

Sigma-Aldrich MGYP Agar with Copper is a reliable and cost-efficient selective medium for isolating and monitoring yeast contaminants in brewing environments. Its composition supports the growth of a broad spectrum of wild yeasts, aiding in early detection and microbial quality assurance throughout fermentation and production workflows.