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Case #156 - May, 2005

A 25-year-old man living in South America became ill with intestinal cramping and watery diarrhea. Stool specimens were collected and an O & P exam was ordered by his physician. The lab performed an FEA concentration on the sample, prepared wet mounts, and examined them using UV fluorescence microscopy. Images were captured and submitted to DPDx/CDC. Figures A and B were taken at 400× magnification. 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 24, 2016