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Bacterial research. Counting of bacterial colonies (spots) on a petri dish. The petri dish contains a nutrient medium (such as agar) on which a sample
Bacterial research. Counting of bacterial colonies (spots) on a petri dish. The petri dish contains a nutrient medium (such as agar) on which a sample of bacteria has been cultured. The amount and size of the bacterial colonies will depend on the agar used and the temperature at which the sample was cultured. Photographed at the Genethon Laboratory in France.
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