[kom-pluh-muh nt-fik-sey-shuh n]
a test for diagnosing an infectious disease by detecting the presence of antibody in the blood, based on the fixing of a known quantity of complement to the antigen being tested and the specific antibody that combines with it. Abbreviation: CFT
Origin of complement-fixation test
First recorded in 1910–15
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
An immunological test for determining the presence of a particular antibody in which serum is treated in a manner that allows existing antibodies to accept and bind to a known amount of antigen. If binding occurs the presence of the antibody is verified and its concentration in the serum can be calculated based on the amount of antigen added to the system.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.