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Case #527 – November, 2020

56-year-old Korean immigrant sought medical attention for non-specific abdominal pain and mild, intermittent diarrhea. A stool specimen was collected and sent for ova and parasite (O & P) examination. Figures A and B show what was detected in low numbers on a wet-mount preparation following fecal concentration. The objects of interest average 30 micrometers in length. 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