title: Serological evidence of group Y Neisseria meningitidis infections prior to isolation and identification of the organism.
mesh_terms: D000907:Antibodies, Bacterial / Q000032:analysis*; D006801:Humans; D008589:Meningococcal Infections / Q000175:diagnosis*; D008887:Military Medicine; D009345:Neisseria meningitidis / Q000276:immunology*; D012698:Serologic Tests
chemical_list: D000907:Antibodies, Bacterial