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What's the difference between chocolate agar medium and blood agar medium?
How is agar made?
Agar is derived from certain species of red algae and is extracted from the cell walls of these seaweeds. The agar flakes are then soaked in water, boiled and skimmed to remove impurities, and then cooled and hardened into slabs or powder. These slabs and powders can be melted and molded as needed to create different types of media for microbiological applications.