cataphylaxis

[kăt′ə-fə-lăksĭs]
n.
  1. Movement or transportation of white blood cells and antibodies to the site of infection.
  2. A deterioration or breakdown in the natural mechanisms by which the body resists infectious disease.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.