TLR4 and Increased total eosinophil count: Although PBS-treated TLR-4−/− mice showed stronger airway eosinophilia than PBS-treated wild type mice, indicating suppression of airway inflammation by TLR-4 signaling, it is interesting to note that A. baumannii treatment suppressed airway eosinophilia in both TLR4−/− and wild type mice at a similar magnitude (Figure 8).