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Case #525 – October, 2020

A 45-year-old male who recently returned from a trip overseas to Korea presented to his primary care clinic for an annual checkup at a clinic in the United States. He had no major health problems, apart from reported mild, intermittent epigastric pain, nausea, and diarrhea. When questioned about his travel, he reported spending time in rural areas and consuming dishes likely containing undercooked frog meat. Because of this history, the physician ordered a stool ova and parasite (O&P) examination. Parasite eggs were detected on the formalin-ethyl acetate (FEA) concentrated wet mount, but the laboratory staff could not definitively identify them, so the specimen was forwarded to a reference laboratory.  Figures AD are the eggs, which measured an average of 58 x 39 µm. What is your diagnosis? Based on what features?

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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: June 10, 2021