title: Absence of B lymphocytes in a horse with primary agammaglobulinemia.
mesh_terms: D000361:Agammaglobulinemia / Q000276:immunology*; D000818:Animals; D001402:B-Lymphocytes; D002464:Cell Migration Inhibition; D004195:Disease Models, Animal; D006736:Horses; D007962:Leukocytes / Q000276:immunology; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000276:immunology