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Case #518 - June, 2020

A 24-year-old man from Thailand presented to his healthcare provider with complaints of gastrointestinal pain and weight loss. He also reported seeing thin worms in his stool on rare occasion. A stool specimen was collected, and two worms were recovered and examined. Figure A shows the worms at 40X magnification and Figures B and C at 100X magnifications. What is your diagnosis? Based on what criteria?

Figure A

Figure A

Figure B

Figure B

Case_518_C

Figure C

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 25, 2020