Determination of tetanus antitoxin levels in hyperimmunized volunteers.

A method is described using double diffusion with a perspex template for determining tetanus antitoxin levels in the plasma of volunteers who have been hyperimmunized with tetanus toxoid for the purpose of producing human tetanus immune globulin. This test is simple to perform, economical, sentitive, reproducible and is in excellent agreement with the standard toxin neutralization test in mice. Comparisons with the in vivo toxin neutralization test are presented for this test, the passive hemagglutination, radial immunodiffusion and counter electrophoresis methods.