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Titer

Definition

A titer is a measurement of the amount or concentration of a substance in a solution. It usually refers to the amount antibodies found in a patient's blood.

Information

Blood titer measurements can be very helpful in determining medical treatment. Antibody titers can tell the doctor if the patient has immunity to diseases such as measles, small pox, and hepatitis. The measurement is expressed as a ratio, such as 1:40.


Review Date: 8/11/2009
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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