Hemagglutination Inhibition Tests

**Definition:** Serologic tests in which a known quantity of antigen is added to the serum prior to the addition of a red cell suspension. Reaction result is expressed as the smallest amount of antigen which causes complete inhibition of hemagglutination.

**Tree numbers:** - E01.370.225.812.735.370 - E05.200.812.735.370 - E05.478.594.760.370

**Synonyms:** - Hemagglutination Inhibition Test