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2. Why is differential media typically inoculated with isolated colonies that have been previously cultured on...

2. Why is differential media typically inoculated with isolated colonies that have been previously cultured on general growth media?

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Differential media are growth media that allow the growth of certain bacteria so that they can be innoculated. They help to distinguish between closely related organisms. The difference can be visually distinguished by certain biochemical reactions that may be caused by one species but not by the other.

Innoculation of differential media is done to obtain reproducibility of quantitation results. When bacteria grow on general growth media there is no way to distinguish the different species or groups. When innoculated on the differential media, they can be isolated on the basis of the biochemical reaction they might or might not cause.

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