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Bacterial growth in J774 macrophages assessed by CFU at 0, 24, 48, and 72 hours postinfection. Infection with MAA wild type (black bars), MAAΔlprG (white bars), MAAΔlprG::lprG (light grey bars), and MAAΔlprG::lprG-p55 (strong grey bars) performed at a MOI of 5. Data indicate the mean ± SD of log CFU by triplicate. Significantly different from values of the wild type strain **P < 0.01, *P < 0.05.
