What does antibody titre mean?
The titre (or titer) of an antibody sample is a measure of the antibody concentration determined under a defined set of conditions. Serial dilutions of the antibody sample (test bleed or purified antibody) are allowed to react with a known amount of antigen. The antibody titre is defined as the lowest dilution to bind significantly to the antigen and is expressed as the reciprocal dilution giving an optical density (OD) reading at 450nm of 1.
