FN1 and infection: Upon i. d. inoculation of C3H mice with isogenic B. burgdorferi strains that differ only in their ospC coding sequence, we found that the OspCN40-D10/E9, OspCB31, and OspCPBr, each of which binds fibronectin, dermatan sulfate, or both, were fully capable of promoting colonization of the injection site, ear, heart and bladder at three weeks post infection.