GAL and bronchopneumonia: Mice infected with the mutants in Gal catabolic pathways survived significantly longer than wild type D39 strain in the bronchopneumonia model (Fig 7A) (average survival time of mice infected with: D39 44±30.7 h, n = 20; D39ΔgalK 60±36.3 h, n = 10; D39ΔlacD 59±54.1 h, n = 10 and D39ΔlacDΔgalK 123±55.8 h, n = 10; p<0.01 for D39ΔgalK, and p<0.001 for D39ΔlacD and D39ΔlacDΔgalK; Mann-Whitney U test).