Immunodiffusion is a laboratory technique used to detect and quantify antigens and antibodies by observing their interactions within a gel medium. This technique involves the diffusion of antigens and antibodies through a gel, usually agar, resulting in the formation of a visible precipitate when they interact.
Applications.
Immunodiffusion techniques are widely used in immunology for various purposes, including:
Types of Immunodiffusion.
Single Immunodiffusion (Radial Immunodiffusion).
In this method, antibodies are uniformly distributed in an agar gel, and the antigen sample is placed in wells cut into the gel. As the antigen diffuses radially, it forms a precipitation ring with the antibody. The diameter of this ring corresponds to the concentration of the antigen in the solution.
Double Immunodiffusion (Ouchterlony Technique).
This method involves both antigen and antibody diffusing through the gel from separate wells, forming precipitation lines where they meet and react.
# Single diffusion in one dimension (Oudin procedure)
# Double diffusion in one dimension (Oakley Fulthorpe procedure)
Notes.
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