Case #353 – August, 2013

A 27-year-old man sought medical assistance for gastrointestinal symptoms that included watery diarrhea, abdominal pain, and fatigue. He reported no international travel within the last year. A fecal specimen was collected in zinc-PVA (polyvinyl alcohol) for ova-and-parasite (O&P) testing. A smear was prepared and stained with trichrome stain. Figures AC show what was observed in moderately high numbers on the smear. What is your diagnosis? Based on what criteria?

Figure A

Figure B

Figure C

Images presented in the DPDx case studies are from specimens submitted for diagnosis or archiving. On rare occasions, clinical histories given may be partly fictitious.

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