Bird Seed Agar for the isolation of Cryptococcus neoformans

Bird Seed Agar for the isolation of Cryptococcus neoformans

Bird Seed Agar is a solid medium used for selective and differential isolation of Cryptococcus neoformans from clinical specimens. Cryptococcus neoformans is an encapsulated yeast that produces the enzyme phenoloxidase, an enzyme necessary in melanin synthesis. The brown pigmented colonies of Cryptococcus neoformans were observed by Staib in 1962 when he grew cultures of the yeast …

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Sabouraud Dextrose Agar (SDA) – Composition, Principle, Uses, Preparation and Colony Morphology

Colony Morphology on SDA

Sabouraud Dextrose Agar (SDA) is used for the isolation, cultivation, and maintenance of non-pathogenic and pathogenic species of fungi and yeasts. SDA was formulated by Sabouraud in 1892 for culturing dermatophytes. The pH is adjusted to approximately 5.6 in order to enhance the growth of fungi, especially dermatophytes, and to slightly inhibit bacterial growth in clinical specimens. Composition …

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Potato Dextrose Agar (PDA)- Principle, Uses, Composition, Procedure and Colony Characteristics

Colony Characteristics on Potato Dextrose Agar (PDA)

Potato Dextrose Agar (PDA) is used for the cultivation of fungi. Potato Dextrose Agar (PDA) is a general purpose medium for yeasts and molds that can be supplemented with acid or antibiotics to inhibit bacterial growth. It is recommended for plate count methods for foods, dairy products and testing cosmetics. PDA can be used for growing clinically significant yeast and …

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