SKE (ethanol extract of S. koraiensis) reduced airway hyperresponsiveness (AHR) and inflammatory cell counts during ovalbumin (OVA)-induced allergic airway inflammation. The bronchoalveolar lavage fluid (BALF) was stained with a Diff-Quik agent for cell counting, and AHR was measured by using whole-body plethysmography. (a) AHR and (b) inflammatory cell counts in the BALF. NC (normal control), PBS (phosphate buffered saline) treatment and PBS sensitization/challenge; OVA, PBS treatment and OVA sensitization/challenge; Mon: montelukast treatment and OVA sensitization/challenge; SKE 20 and 40, SKE treatment (20 and 40 mg/kg, respectively) and OVA sensitization/challenge. Values are shown as the mean ± SD (n = 5). ## p < 0.01 versus NC; *,** p < 0.05 and 0.01 versus OVA.