The Tetanus IgG test is a blood test used to determine the presence of antibodies against the tetanus toxin. Tetanus is a potentially deadly infection caused by the bacterium Clostridium tetani, which can enter the body through a wound or cut. The bacteria produce a toxin that affects the nervous system, leading to muscle stiffness and spasms. Immunization with the tetanus vaccine is highly effective at preventing the disease, and the IgG test is often used to assess an individual’s immune status and determine whether they need a booster shot. The test measures the levels of tetanus-specific IgG antibodies in the blood, which are produced in response to vaccination or exposure to the bacterium. High levels of IgG antibodies indicate a strong immune response and protection against tetanus.