Received my unknown specimen for the lab final last week. Streaked for isolation, including one on EMB agar and one on an MSA.
And tonight, when I pulled my plates out of the incubator....I said, "HECK YES!!!" Because I knew exactly what I had. It is beautiful!!
This is Escherichia coli, a Gram-negative, facultative anaerobic, rod-shaped bacterium that will grown metallic green colonies on eosin-methylene blue agar.
My other unknown, I suspect is either Staphylococcus aureus or Enterococcus faecalis. The second specimen is definitely gram-positive and coccus from the results of the Gram-Stain I did on it tonight and then viewed under the scope. Both speices, will ferment MSA, as evidence in this photo of the colony I streaked for isolation on a MSA plate. The species on this plate is incredibly pungent. Like gym socks. So my guess is it's the S. aureus, but that will not be confirmed until I run additional tests next week.
I LOVE MICRO!! :)
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