Immunodiffusion

Immunodiffusion is a diagnostic test which involves diffusion through a substance such as agar which is generally soft gel agar (2%) or agarose (2%), used for the detection of antibodies or antigen.

The commonly known types are:
 * Single diffusion in one dimension (Oudin procedure)
 * Double diffusion in one dimension (Oakley Fulthorpe procedure)
 * Single diffusion in two dimensions (radial immunodiffusion or Mancini method)
 * Double diffusion in two dimensions (Ouchterlony double immunodiffusion)