A laboratory technician performs an antibody titer.A reaction is detected in every dilution from 1:2 up to and including 1:64.What does this tell the technician about the amount of antibody present?

Question

Quizplus · Accepted Answer

The fact that a reaction was detected in every dilution from 1:2 up to and including 1:64 indicates that there is enough antibody in the serum to react visibly with antigen when diluted 64-fold, but not at 128-fold or more. This means that the technician cannot calculate the amount of antibody in the original sample (choice A) and we cannot conclude that the antibody is able to detectably bind all the antigen present in a sample at a 1:64 dilution (choice B). Therefore, the best choice is C.

A Laboratory Technician Performs an Antibody Titer