larva currens

[kûrənz]
n.
  1. Creeping eruption caused by rapidly moving larvae of Strongyloides stercoralis, typically extending from the anal area down the upper thighs.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.