Thursday, October 24, 2013

These bacteria sure can party!!

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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