Case #356 – September, 2013

After returning from a weekend camping trip, a hunter from Massachusetts discovered a tick attached to his lower leg. He removed the tick and brought it to his local health department, who in turn forwarded the specimen to the State Entomologist for identification. Figure A shows a dorsal view of the tick, while Figure B shows the underside. Figure C shows a close-up of the mouthparts. What is your identification? Based on what criteria? What is the public health importance, if any, if this genus in North America?

Figure A

Figure B

Figure C

Images presented in the DPDx 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