IFNα and IFNβ (102 and 103 IU/mL), in either the pre-infection or the post-infection treatments of C. trachomatis-infected human synovial fibroblasts, did not show any significant decrease in the number of chlamydial IFUs, as compared to uninfected cells (Figure 1 and Figure 2). This evidence concerns the gene IFNB1 and infection.