Figure 4.

T3SS3 mutants activate NFκB at late time-points corresponding to escape into cytosol. A) HEK293T cells were transfected with pNFκB-SEAP for 24 hr. The transfected cells were infected with wildtype KHW and ΔbsaM at MOI of 10:1. Supernatants were collected at respective time points for SEAP assay. B) HEK293T cells were infected with wildtype KHW and ΔbsaM at MOI of 10:1 for 18 hr. The infected cells were fixed, stained with Giemsa and visualized under 10x magnification on a light microscope.