Figure 5. Exposure to N-SOA with/without O₃ and/or NO₂ did not result in inflammatory cell recruitment to the lungs.

(a) Bronchoalveolar lavage fluid total leukocyte counts are similar in all exposure groups, regardless of concentrations of N-SOA or co-exposure with O₃ and/or NO₂ (p > 0.05, n = 5–11 mice/group). (b) Hematoxylin and eosin staining of lung sections from mice exposed to FA (top panel) and N-SOA (150 μg/m³, bottom panel) are similar and show no evidence of airway or lung inflammation.