Monday, October 3, 2011

Case of the Week 178

The following is a concentrated stool specimen stained with a modified acid fast stain. The patient had reported to his physician after a week-long bout of diarrhea. He had recently attended an event in which he and other guests had eaten fresh salad. Several of the other guests are also sick.

Objects shown measure 10 micrometers in diameter.
Identification?
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10 comments:

  1. AnonymousOctober 3, 2011 at 11:55 AM

    Giardia

    ReplyDelete
  2. AnonymousOctober 3, 2011 at 12:55 PM

    Cyclospora cayetanensis

    ReplyDelete
  3. Neuro_NurseOctober 3, 2011 at 1:22 PM

    Too big to be microsporidia or Cryptosporidium, too big to be Sarcocystis, wrong morphology for Cystoisospora (Isospora - when did that happen?):

    Cyclospora cayetanensis

    ReplyDelete
  4. AnonymousOctober 3, 2011 at 2:04 PM

    Cyclospora cayetanensis oocysts

    ReplyDelete
  5. Neuro_NurseOctober 3, 2011 at 2:14 PM

    Erratum: too small to be Sarcocystis

    ReplyDelete
  6. MicrobeManOctober 3, 2011 at 8:27 PM

    Cyclospora cayetanensis. The oocysts are too large to be Cryptosporidium.

    ReplyDelete
  7. KathyOctober 4, 2011 at 11:13 AM

    Cyclospora cayetanensis. You can follow it up with autofluorescence to verify.

    ReplyDelete
  8. AnonymousOctober 4, 2011 at 11:43 PM

    Cyclospora Cayetenensis

    ReplyDelete
  9. Lukus RobertsOctober 5, 2011 at 5:55 AM

    at first i thought maybe Blastocystis hominis but i think what i thought were 'external nuclei' are in fact bacteria surround the perimeter of the cysts so i will also go with Cyclospora caytanensis - which specially makes sense if the lettuce was contaminated

    ReplyDelete
  10. AnonymousOctober 6, 2011 at 12:59 AM

    Where did the salad come from? Guatemala or another central American country? Or where?

    ReplyDelete