Antibody titer refers to the measurement of antigens and antibodies involved in various immune reactions, which can be quantified in mass, units, or titer. It represents the highest dilution of serum that produces an observable reaction with the antigen in a specific test. Factors such as the nature and quantity of the antigen, and the test conditions affect the serum titer.

1. What does "antibody titer" mean?
Solution
It is a method for the measurement of the antigens and antibodies participating in primary,
secondary and tertiary reactions. Measurement may be in terms of mass or units or titre. The
antibody titre of a serum is the highest dilution of serum that show an observable reaction with
the antigen in the perticular test. The titre of serum influenced by the nature and quantity of the
antigen and the type and conditions of test.