bannermenu

Case #167 - November, 2005

A 45-year-old woman went to her physician with complaints of recurring abdominal cramping, bloating, and infrequent diarrhea. Her travel history included a 10-day camping trip in Alaska, and her symptoms had started approximately 2 weeks after her return. Her physician ordered an ova and parasites (O & P) examination. Figures A-D show objects observed on a trichrome stained fecal smear; A-C were found in moderate numbers on the smear, while D was found in very few numbers. The objects shown ranged in size from 5 to 7 micrometers. What is your diagnosis? Based on what criteria?

Figure A

Figure A

Figure B

Figure B

Figure C

Figure C

Figure D

Figure D

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