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DictionarySeeWidal testWidal Reaction
Widal Reaction an agglutination reaction test used to diagnose typhoid fever, proposed in 1896 by the French physician F. Widal (1862-1929). The reaction is based on the ability of antibodies (agglutinins) formed in the body during a disease and persisting long after recovery to cause typhoid microorganisms to clump together. If agglutination takes place when a culture of the causative agent is added to human serum, the reaction is considered positive. The Widal reaction is run several times in the diagnosis of typhoid fever, and the results are considered dynamically and in relation to the anamnesis. Widal reaction
Wi·dal re·ac·tion (vē-dahl'), agglutination reaction as applied to the diagnosis of typhoid. Synonym(s): Gruber reaction, Gruber-Widal reactionWidal reaction, Widal test (vē-dal′) [Georges Fernand Isidore Widal, Fr. physician, 1862–1929] An agglutination test for typhoid fever.Widal, Georges Fernand Isidor, French physician, 1862-1929. Gruber-Widal reaction - Synonym(s): Widal reactionHayem-Widal syndrome - see under HayemWidal and Abrami test - for paroxysmal hemoglobinuria.Widal reaction - agglutination reaction as applied to the diagnosis of typhoid. Synonym(s): Gruber reaction; Gruber-Widal reactionWidal syndrome - Synonym(s): Hayem-Widal syndrome |