title: Ontogeny of cell populations required for immunocompetence.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000921:Antibody-Producing Cells; D000941:Antigens; D001853:Bone Marrow; D001854:Bone Marrow Cells; D016026:Bone Marrow Transplantation; D002454:Cell Differentiation; D004755:Enterobacteriaceae / Q000187:drug effects; D004912:Erythrocytes / Q000276:immunology; D005333:Fetus; D006462:Hemolytic Plaque Technique; D007421:Intestine, Small; D008099:Liver / Q000276:immunology; D008198:Lymph Nodes / Q000276:immunology; D051379:Mice; D010406:Penicillins / Q000494:pharmacology; D011828:Radiation Chimera; D013154:Spleen / Q000276:immunology; D013307:Streptomycin / Q000494:pharmacology; D013934:Thymectomy; D013950:Thymus Gland / Q000276:immunology*
chemical_list: D000941:Antigens; D010406:Penicillins; D013307:Streptomycin