title: Attempts at isolation of lymphocytosis-producing factor from supernatant fluids of Bordetella pertussis cultures.
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D001886:Bordetella pertussis / Q000032:analysis*; D002850:Chromatography, Gel; D005260:Female; D008218:Lymphocytosis / Q000209:etiology*; D051379:Mice; D008970:Molecular Weight; D014118:Toxins, Biological / Q000302:isolation & purification*
chemical_list: D014118:Toxins, Biological