Tetanus Screen Blood Test

Tetanus antitoxin antibodies are produced by the immune system in response to tetanus vaccination. These antibodies neutralise the tetanus toxin produced by Clostridium tetani bacteria, preventing the severe muscle spasms and potentially fatal complications of tetanus infection. Interpreting Levels: Antibody levels are typically reported in IU/mL. Levels ≥0.1 IU/mL are generally considered protective. Levels between 0.01–0.1 IU/mL indicate some protection but a booster may be recommended. Levels below 0.01 IU/mL indicate inadequate protection and vaccination is recommended. What Protective Levels Mean: If your antibody level is protective (≥0.1 IU/mL), you have adequate immunity against tetanus. However, immunity can wane over time, so periodic reassessment may be helpful, particularly if you are at increased risk of exposure (e.g., outdoor workers, gardeners, travellers to remote areas). What Low Levels Mean: If your antibody level is low or undetectable, you may not be adequately protected against tetanus. A primary course or booster vaccination is recommended. Your GP or a travel clinic can advise on the appropriate vaccination schedule. About Tetanus: Tetanus is caused by bacteria found in soil, dust, and animal faeces. The bacteria enter the body through wounds, particularly deep puncture wounds, burns, or wounds contaminated with soil. Tetanus causes severe muscle stiffness and spasms ("lockjaw") and can be fatal. Unlike many infections, tetanus is not spread person-to-person, and immunity does not develop naturally from infection—vaccination is the only way to build protection.