Discussion
Antibody titer refers to the :
Answer: D
Antibody titer is the highest dilution of antibody suitable to give a positive result in a test system.
A serum is diluted serially, for example 1:10, 1:20, 1:40 and so on, and each dilution is tested in an assay such as agglutination, haemagglutination inhibition or ELISA. The titer is the last dilution still giving a detectable positive reaction, usually reported as its reciprocal, such as 320. It is a relative measure used to compare samples, for example to show a rise in antibody between two samples in an infection.
It is not the absolute amount or the exact concentration of antibody, which need quantitative assays against a standard, and it is not avidity, the overall binding strength of a multivalent antibody.
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