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Complement and antibody responses: Demonstrating antibody titer against C. rodentium Intimin, LPS and sonicate in wildtype (circles) and C3–/– (diamonds) 14 days post-inoculation with C. rodentium. From left to right: the different antibodies that were tested (IgM, IgG2b and IgG2c). From top to bottom: the three antigens (Intimin, LPS and sonicate). Asterisk indicates a significant difference between wildtype and C3–/–
