Table 1. Histopathology scores.

Group		WT		S100A9 KO
C	0.50 [0.3]		1.50 [0.4]
HVT MV	2.33 [0.3]		2.67 [0.4]
LPS	2.50 [0.6]		2.14 [0.4]
HVT MV+LPS	6.33 [0.61]		4.43 [0.5]*

Lung injury scores of wild-type (WT) and S100A9 knockout (KO) mice of the non-ventilated control group (C), high tidal mechanically ventilated group (HV_T MV), LPS-exposed non-ventilated group (LPS), and LPS-exposed followed by mechanical ventilation group (HV_T MV+LPS). Data represent mean ± [SEM] of n = 6–7 mice/group.

^*p<0.05 compared to WT mice of the HV_T MV+LPS group.