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Growth in the lungs of immunocompetent C57Bl/6 mice, following low-dose aerosol infection, of: A. M. bovis, M. bovis ΔnadABC and M. bovis ΔnadABC complemented; B. M. tuberculosis, M. tuberculosis ΔnadABC and M. tuberculosis ΔnadABC complemented; and C. M. bovis ΔnadABC, M. bovis ΔnadABC pMV261::pncATB, and M. bovis ΔnadABC complemented
