Antigen Excess Testing
Ambiguous Response
IMMAGE 800 Operations Manual A11403
Theory of Operations
September 2016
Page 3-9
3
Ambiguous Response
It is possible for two significantly different sample concentrations of antigen to yield
the same rate response. Either the rate response represents the correct concentration in
the area of AbXS (left side) or the same rate response represents a concentration that is
in the area of AGXS (right side) and requires further dilution. Antigen excess testing
differentiates these two situations. (Refer to Figure 3.7.)
Figure 3.7
Antigen Excess Detection
1. X = Increasing antigen concentration
2. Y = Rate response
3. Antibody excess (AbXS)
4. Antigen excess (AGXS)
X
Y
A011361L.EPS
3
1
4
2