All are true about precipitation reaction except:
|A||Reaction of souble antigen with antibody|
|B||Very sensitive for detection of antigens|
|C||Kahn test is an example|
|D||Eleks test is an example|
|E||All are true|
a. When soluble antigen combines with antibody, the immune complex formed settles (precipitates).
b. Examples include: Ascoli’s thermoprecipitin test, capillary precipitation, Kahn test, VDRL test, precipitation in gel (Elek’s gel test) etc. These tests are most sensitive as compared to agglutination for detection of antigens.