title: Surface immunoglobulins and lymphocyte activation in gnotobiotic animals.
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology; D005856:Germ-Free Life; D008213:Lymphocyte Activation; D011947:Receptors, Antigen, B-Cell; D013154:Spleen / Q000166:cytology; D013552:Swine / Q000276:immunology*
chemical_list: D011947:Receptors, Antigen, B-Cell