Disruption of individual rpf-like genes does not alter bacterial burden in organs of C57BL/6 mice through 16 weeks postinfection. Bacterial numbers in the lung (A), spleen (B), and liver (C) of C57BL/6 mice infected by aerosol with either Erdman wild type (WT) (•), mc23125 (ΔRv2389c) (○), mc23126A (ΔRv1009rev) (▾), mc23127 (ΔRv2450c) (▿), mc23128 (ΔRv1884c) (▪), or mc23129 (ΔRv0867c) (□) were determined. Data (means ± standard error [error bars] of three to four mice per group) are representative of three independent experiments.