title: Studies of the Treponema pallidum immobilizing activity in normal human serum. I. A method.
mesh_terms: D000818:Animals; D002118:Calcium / Q000378:metabolism; D003165:Complement System Proteins; D004912:Erythrocytes / Q000276:immunology; D006460:Hemolysin Proteins; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007106:Immune Sera; D008274:Magnesium / Q000378:metabolism; D008722:Methods; D011817:Rabbits; D012698:Serologic Tests; D012756:Sheep / Q000276:immunology; D013696:Temperature; D013997:Time Factors; D014209:Treponema Immobilization Test; D014210:Treponema pallidum / Q000276:immunology*
chemical_list: D006460:Hemolysin Proteins; D007106:Immune Sera; D003165:Complement System Proteins; D008274:Magnesium; D002118:Calcium