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MacConkey Medium: Introduction, Principle, Composition, Preparation, Procedure, Colony Morphology and Uses
Introduction of MacConkey Medium MacConkey agar(MAC) or MacConkey Medium uses for the culture of gram-negative bacteria and therefore Enterobacteriaceae belonging bacteria grow well on this medium and coliforms also enjoy this medium. MacConkey Agar is a modification of Neutral Red Bile Salt Agar developed by MacConkey. It was one of the earliest culture media for the cultivation and identification of enteric organisms from clinical specimens as well as food and water. It is a selective, differential, and indicator medium because...
CMA: Introduction, Principle, Composition, Test Procedure, Colony Characteristics and Uses
Introduction of CMA CMA stands for Corn Meal Agar and it is a well-established fungal medium that is a suitable substrate for chlamydospore production by Candida albicans and the maintenance of fungal stock cultures. This is a very simple formulation containing only cornmeal infusion and agar. The addition of glucose (0.2 g% w/v) to CMA will enhance the chromogenesis of some species of Trichophyton e.g. Trichophyton rubrum. Corn meal agar is an enrichment medium developed by...
PDA: Introduction, Principle, Composition, Test Procedure, Colony Characteristics and Uses
Introduction of PDA PDA stands for Potato Dextrose Agar and it is a fungal medium and its ingredients are clear from its name which contains potato ( vegetable), dextrose ( sugar), and agar ( solidifying agent). PDA is recommended for the isolation and enumeration of fungi (yeasts and molds) from water, dairy, other food products, and even clinical specimens ( skin scrappings). The nutritionally rich base, potato infusion encourages mold sporulation and pigment production in some dermatophytes...