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?
Monday, October 3, 2011
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10 comments:
Giardia
Cyclospora cayetanensis
Too big to be microsporidia or Cryptosporidium, too big to be Sarcocystis, wrong morphology for Cystoisospora (Isospora - when did that happen?):
Cyclospora cayetanensis
Cyclospora cayetanensis oocysts
Erratum: too small to be Sarcocystis
Cyclospora cayetanensis. The oocysts are too large to be Cryptosporidium.
Cyclospora cayetanensis. You can follow it up with autofluorescence to verify.
Cyclospora Cayetenensis
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
Where did the salad come from? Guatemala or another central American country? Or where?
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