Case #388 – January 2015

Case Description

A 42-year-old man with a history of living abroad in Peru for a year returned home to the United States. He reported to his health care provider that he had been experiencing vague intermittent abdominal discomfort. A stool specimen was collected and processed for ova-and-parasite (O&P) examination. Figures AE show what was observed at 400x magnification in moderate numbers; Figures A and B are of the same object in different focal planes. The object in Figure D is approximately 33 micrometers in diameter. What is your diagnosis? Based on what criteria?

Figure A

Figure B

Figure C

Figure D

Figure E

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.

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