Pink Yellow
Posted November 21, 2009
By admin
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What’s the difference between bacteria that is yellow or pink on an agar plate?
I started this project for the Science Fair about bacteria. I had been testing what household surfaces had the most bacteria. When I had tested the toilet seat, some bacteria came out as yellow and others came out as a pink. Does this mean some colonies are on the verge of dying or are they a different type of species?
depends on what type of agar plate you are using (blood, maconkey, etc). yellow might be a staph aureus, pink could be serratia, or E.coli. It also depends on how it was incubated and at what temperature.
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