During infection, an nramp1 mutant strain is more permissive for intracellular growth of Mycobacterium species and L. pneumophila (272), and nrampB null or nramp1 and B double null mutants are more permissive for L. pneumophila growth (effects of nrampB deletion on the growth of Mycobacterium species have not been reported) (273). The gene discussed is SLC11A1; the disease is infection.