ITGAX and infection: To determine if the higher levels of neutrophils in the lungs of M. tuberculosis-infected Atg5fl/fl-CD11c-Cre mice was due to elevated neutrophil abundance in circulation prior to or during infection, we monitored neutrophil frequency in the blood in uninfected and 14 dpi Atg5fl/fl and Atg5fl/fl-CD11c-Cre mice.