In order for scientists to experiment with, and learn more about microbes, investigators must be able to grow these tiny organisms in a laboratory by providing them with water, food and an environment to grow in. Media are initially sterilized, then inoculated with the bacteria that is of interest and finally incubated for twenty four hours or more, to encourage bacterial growth.

Broth and Agar Bacterial Growth Media

The two main types of bacterial growth media used are liquid broth and solid, Jell-o-like agar. Each has specific advantages and disadvantages. The growing environment used will depend on what the researcher wants to do with, or learn from, the microbes.

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