STAT1 and infection: To investigate whether STAT1 affected the inflammatory infiltrate, we isolated leukocytes from enzymatically disrupted mouse lungs harvested on day 8 post-infection and used cell surface markers to quantify macrophage (CD11c−/CD11b+/GR-1int/MHCII+), neutrophil (F480−/CD11b+/CD11c−/GR-1+), and eosinophil (CD11c−/Siglec+/GR-1−) populations in 129 WT and STAT1−/− mice.