Potato Dextrose Agar (PDA) w/o Tartaric Acid 25mL Plate, 10/Pk

Potato Dextrose Agar (PDA) is the standard, general-purpose medium used for the cultivation and enumeration of yeasts and molds in food, dairy, and clinical microbiology. This specific formulation is "w/o (without) Tartaric Acid," meaning it retains the standard pH of 5.6 rather than being acidified to pH 3.5.

Key Features of the 25mL "Deep Fill": This plate is poured with 25mL of agar, significantly more than the standard 18-20mL plate.

1. Extended Incubation: Fungi are slow growers, often requiring 5 to 7 days (or longer) to mature. Standard plates can dry out and crack during this time. The 25mL volume acts as a moisture reservoir, ensuring the medium remains viable throughout the entire incubation period.

2. Spore Safety: The extra depth helps prevent the agar from splitting, which can be a safety hazard when handling plates containing sporulating molds.

Application: Because it does not contain strong acid or antibiotics, this medium is suitable for:

• General Enumeration: Growing a wide range of fungal species, including those that might be sensitive to low pH.

• Sub-culturing: Maintaining stock cultures where bacterial contamination is not a primary concern.

• differentiation: The rich potato-dextrose base stimulates sporulation and pigment production, which are essential for visual identification of molds like Aspergillus and Penicillium.

• Standard Formulation: Classic pH 5.6 medium for broad-spectrum fungal growth.

• Deep Fill (25mL): Prevents desiccation during long incubation periods (5+ days).

• Versatile: Supports both yeasts and molds.

• Morphology: Encourages typical colony color and structure for easier identification.

• Format: Sterile 15x100mm petri dishes in a 10-pack.

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