Deficient classical complement pathway activity in newborn sera.
D000328:Adult; D001770:Blood Bactericidal Activity; D003166:Complement Activating Enzymes / Q000172:deficiency; D003167:Complement Activation; D015922:Complement C1q; D003181:Complement C4 / Q000172:deficiency; D003171:Complement Pathway, Classical; D005260:Female; D006801:Humans; D005779:Immunodiffusion; D007231:Infant, Newborn; D009895:Opsonin Proteins / Q000276:immunology; D013292:Streptococcus agalactiae / Q000276:immunology
D003181:Complement C4; D009895:Opsonin Proteins; D015922:Complement C1q; D003166:Complement Activating Enzymes