1. Precipitation Tests
Precipitation
Soluble Ab
Immunodiffusion

2. Agglutination Tests Agglutination
____________ Ag plus Ab cause clumping
Easy to perform and read
Indirect agglutination tests
Place Ab or AG on artificial particles
Latex spheres
Clay particles

3. Complement Fixation
Ab/Ag complex competition

4. Neutralization
Ab binds a toxin active site or viral binding site during incubation, neutralizing cell-damaging effects
The mix is placed over a cell layer in culture
Absence of cytotoxic effects in culture indicates correct diagnosis

5. Immunofluoroescence

6. ELISA Tests Enzyme Linked ImmunoSorbent Assay
Enzymatic color reaction is stimulated when productive Ab/Ag binding occurs
______________ indicates correct diagnosis