Titer

Definition

A titer is a laboratory test that measures the presence and amount of antibodies in the blood. It helps determine immunity to specific diseases after vaccination or infection.

5 Must Know Facts For Your Next Test

1. A titer test can indicate whether an individual has immunity to vaccine-preventable diseases such as measles, mumps, and hepatitis B.
2. Titers are often used to assess the need for booster vaccinations.
3. A high antibody titer generally indicates strong immunity, while a low titer may suggest inadequate protection.
4. Titer tests are essential in clinical settings to verify healthcare workers' immunity status before they start working with vulnerable populations.
5. A negative titer result may necessitate revaccination or additional doses of a vaccine.

Review Questions

• What does a high antibody titer indicate about an individual's immunity?
• Why might healthcare facilities require titer tests for their employees?
• What steps should be taken if a person has a low or negative titer result?

Related terms

Antibody: A protein produced by the immune system to neutralize or destroy toxins and pathogens.

Booster Vaccine: An additional dose of a vaccine given periodically to 'boost' the immune system.

Immunization: The process by which an individual becomes protected against a disease through vaccination.