Fig. 3.

Antibody-mediated C3b/iC3b deposition comparing mother and infant colonization groups. Dot plots representing the mean and 95% confidence intervals of log₁₀ FI-C′ values of antibody-mediated C3b/iC3b deposition onto the surface of whole GBS STs Ia, II, III and V bacteria (n = 525). FI-C′ – fluorescence intensity minus complement control; M−I− – neither mother nor infant colonized; M+I+(Ia/II/III/V) – both mother and infant colonized with the homologous GBS ST; M+I− – mother colonized with homologous ST, infant non-colonized with any ST; M+I+O – mother and infant colonized with different GBS ST; M−I+ – infant colonized with homologous ST, mother non-colonized with any ST. M−I− = neither mother nor infant colonized; M+I+ mother and infant colonized; M+I− = mother only colonized; M−I+ infant only colonized; ST = serotype. ANOVA was used to compare groups; *p < 0.05; ***P < 0.01; ****p < 0.001. STIb not shown.