Formerly, the most commonly used test for the diagnosis of syphilis. A sample of the patient’s blood is examined, using a complement-fixation reaction, for the presence of antibodies to the organism Treponema pallidum. A positive reaction (WR+) indicates the presence of antibodies and therefore infection with syphilis. A. P. von Wassermann (1866–1925), German bacteriologist
Subjects: Medicine and Health.