title: The toxicity of meningopneumonitis organisms (Chlamydia psittaci) at different stages of development.
mesh_terms: D000042:Absorption; D000937:Antigen-Antibody Reactions; D000941:Antigens; D000992:Antitoxins / Q000032:analysis; D001426:Bacterial Proteins / Q000032:analysis; D001431:Bacteriological Techniques; D002689:Chlamydia / Q000254:growth & development / Q000276:immunology* / Q000472:pathogenicity; D007106:Immune Sera; D007115:Immunization Schedule; D007739:L Cells; D014118:Toxins, Biological / Q000096:biosynthesis / Q000302:isolation & purification
chemical_list: D000941:Antigens; D000992:Antitoxins; D001426:Bacterial Proteins; D007106:Immune Sera; D014118:Toxins, Biological