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Case #344 - March, 2013

A 26-year-old female presented at a local hospital with severe pain and bloody discharge from the ear. The symptoms started while on a returning flight from vacation in Central America. The patient explained that while on vacation she visited a local physician to have a fly removed from her ear canal. Tissue was removed and sent to Pathology for testing. Several viable fly larvae were observed in the tissue. The case was diagnosed as aural myiasis and the larvae were allowed to mature to aid in identification. Images of mature (third instar) larvae were captured and sent to the DPDx Team for diagnostic assistance. Figure A shows one of the larvae; Figure B shows a close-up of its posterior spiracles. What is your identification? Based on what criteria?

Figure A

Figure A

Figure B

Figure B

This case and images were kindly provided by the University of Washington Medical Center, Seattle, WA.

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