Case #239 – November, 2008

A 50-year-old man went to his health care provider after a week of intermittent diarrhea, cramps and nausea. Stool specimens were collected over three consecutive days and sent to the local public health laboratory for routine ova and parasite (O&P) work-up. Figures AC show objects observed at 1000x magnification on a trichrome-stained slide prepared from the stool specimens. The objects measured approximately 12 micrometers in length. 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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