Titer

Reviewed By David C. Dugdale III, MD, Professor of Medicine, Division of General Medicine, Department…more »

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.

Date Last Reviewed: 08/11/2009

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Titer

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