PURA and infection: We then examined the distribution of infected cells in the tissues for the aroA and purA mutants and observed a small increase in the number of infected cells per field-of-view between 0.5 to 72 h p.i, for both S12023 aroA and S12023 purA, whereas for S12023 sseB aroA and S12023 sseB purA there was a small decrease in the number of infected cells per field-of-view over the same period of infection (Figures 4G and 4H, Figure S6 and Table S2).