title: Leukocytosis-promoting factor of Bordetella pertussis. 3. Its identity with protective antigen.
abstract: Leukocytosis-promoting factor (LPF) was purified from the supernatant of a 5-day liquid culture of Bordetella pertussis strains Tohama and no. 134. The preparations appeared to be filamentous molecules (2 by 40 nm) and contained histamine-sensitizing and hemagglutinin activities in addition to leukocytosis-promoting activity. Active protection tests in mice demonstrated strong protective activities of 80 international protective units per mg of protein in LPF preparations of each strain toxoided by mild Formalin treatment. Passive protection tests in mice with anti-LPF sera indicated that anti-LPF is one of the protective antibodies.
mesh_terms: D000372:Agglutination Tests; D000818:Animals; D000907:Antibodies, Bacterial / Q000302:isolation & purification*; D000942:Antigens, Bacterial; D001426:Bacterial Proteins / Q000032:analysis; D001431:Bacteriological Techniques; D001886:Bordetella pertussis / Q000254:growth & development / Q000276:immunology*; D005260:Female; D005557:Formaldehyde / Q000494:pharmacology; D006385:Hemagglutination Inhibition Tests; D006863:Hydrogen-Ion Concentration; D007106:Immune Sera; D007110:Immunity, Active; D007112:Immunity, Maternally-Acquired; D005779:Immunodiffusion; D007964:Leukocytosis / Q000276:immunology*; D051379:Mice; D008815:Mice, Inbred Strains; D008854:Microscopy, Electron
chemical_list: D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D001426:Bacterial Proteins; D007106:Immune Sera; D005557:Formaldehyde