title: Letter: Escherichia coli K1.
mesh_terms: D000818:Animals; D000942:Antigens, Bacterial / Q000302:isolation & purification; D004926:Escherichia coli / Q000276:immunology*; D006041:Goats / Q000276:immunology; D007106:Immune Sera; D005779:Immunodiffusion; D009345:Neisseria meningitidis / Q000276:immunology; D011135:Polysaccharides, Bacterial / Q000276:immunology; D011817:Rabbits
chemical_list: D000942:Antigens, Bacterial; D007106:Immune Sera; D011135:Polysaccharides, Bacterial