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Case #528 – November, 2020

A 42-year-old State Park employee sought medical care due to fatigue, insomnia, intermittent bloating, and mild anemia. He provided additional information that he often ate various plants (nuts, seeds, and berries) he encountered while on patrol. A stool specimen was collected and processed for ova and parasite (O & P) examination. Figures A and B show what was detected in moderate numbers on a wet mount. Size of the objects was approximately 20 micrometers in diameter. What is your diagnosis? Based on what criteria?

Figure A

Figure A

Figure B

Figure B

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

DPDx is an educational resource designed for health professionals and laboratory scientists. For an overview including prevention, control, and treatment visit www.cdc.gov/parasites/.

Page last reviewed: August 4, 2021