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Medical Definition of Treponema immobilization test
1. Syphilis serodiagnosis employing as the antigen treponema pallidum obtained from rabbit syphilis orchitis. Treponemes are kept alive for a few hours in a special medium. When syphilitic serum and complement are added and incubated, the treponemes are immobilised, i.e., stop moving. (12 Dec 1998)