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?

10 comments:

Anonymous said...

Giardia

Anonymous said...

Cyclospora cayetanensis

Neuro_Nurse said...

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

Cyclospora cayetanensis

Anonymous said...

Cyclospora cayetanensis oocysts

Neuro_Nurse said...

Erratum: too small to be Sarcocystis

MicrobeMan said...

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

Kathy said...

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

Anonymous said...

Cyclospora Cayetenensis

Lukus Roberts said...

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

Anonymous said...

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