What's a Titre Test?

A titer test is a laboratory blood test. It checks for the presence of certain antibodies in the blood stream. Testing involves drawing blood from a patient and check it in a lab for presence of bacteria or disease. It is often used to see if someone is immune to a certain virus or needs vaccination.

How is titre testing done?

A titre test (pronounced TIGHT er) is a laboratory test measuring the existence and level of antibodies in blood. Antibodies are produced when a foreign substance like a virus or bacteria provokes an immune response. Responses can come from natural exposure or vaccination.

What does a positive titer test mean?

A titer may be used to prove immunity to disease. A blood sample is taken and tested. If the test is positive (above a particular known value) the individual has immunity. If the test is negative (no immunity) or equivocal (not enough immunity) you need to be vaccinated.