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Case #482 – December, 2018

A 48-year-old male immigrant from the Middle East underwent a stool examination for ova and parasites (O&P) as part of a refugee screening program. The lab technician observed dark brown-to amber-colored objects in wet mount preparations of formalin-ethyl acetate (FEA) concentrations of the stool sample. The objects measured 41-43 µm in length by 25-28 µm in width. Figures A-D show what was seen in the stool sample.

What is your diagnosis? Based on what criteria?

This case and images were kindly contributed by San Joaquin County Public Health Laboratory, Stockton, CA

Parasitic Image

Figure A

Parasitic Image

Figure B

Parasitic Image

Figure C

Parasitic Image

Figure D

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.

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/.