title: The use of freeze-preserved treponemes in the Treponema pallidum immobilization test.
mesh_terms: D003165:Complement System Proteins; D004121:Dimethyl Sulfoxide; D005615:Freezing; D008722:Methods; D009584:Nitrogen; D014209:Treponema Immobilization Test; D014210:Treponema pallidum
chemical_list: D003165:Complement System Proteins; D009584:Nitrogen; D004121:Dimethyl Sulfoxide