Tuesday, June 9, 2020

Case of the Week 594

This week's case was donated by Florida Fan - a lovely classic protozoan parasite seen in a concentrated wet prep of stool, and trichrome-stained specimen. Each line on the scale bar in the first 2 images represents 2.5 micrometers. Identification?





9 comments:

  1. Considering the number of nuclei in the second picture, Entamoeba coli?

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  2. Blaine A. MathisonJune 9, 2020 at 12:06 PM

    Whenever I lecture or teach on this subject, I always ask my students or the audience if they can count to 5. And if they can, then they should be capable of identifying this species!

    That's all I will say until more answers roll in...

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  3. CNN would say this is Escherichia coli. ;)

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  4. Blaine A. MathisonJune 9, 2020 at 1:55 PM

    They already have! And I have screen captured it for posterity!

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  5. Entamoeba coli. Cyst has 8 nuclei.

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  6. Cyst and trofozoite Entamoeba coli

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  7. Agree with cysts, trophozoite and precyst of Entamoeba coli.

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  8. Entamoeba coli cyst having about 8 nuclei

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