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Q:

What does Proteus Vulgaris look like on a TSA (tryptin-soy agar) plate?

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Proteus swarms, leaving a very thin film of bacteria on the agar surface, but swarming periods are interspersed with periods when the cells stop and undergo a cycle of growth and division so the colony has a distinct zonation (think bulls-eye). Something else interesting... If your agar plate is enriched with urea, proteus degrades this into ammonia, changing the pH of the agar. more
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