At the end of its developmental cycle, C.t. prepackages a subset of type III secreted (T3S) effector proteins—including invasion-specific effector proteins translocated actin recruiting phosphoprotein (TarP), translocated early phospho-protein (TepP), translocated membrane effector A (TmeA), and translocated membrane effector B (TmeB)—into the elementary body (EB), the infectious form of the bacteria, to prime for new rounds of infection (6, –, 10). This evidence concerns the gene SPMIP8 and infection.