Then airway hyperresponsiveness (AHR), eosinophil percentage, levels of interleukin (IL)‐33, IL‐25, IL‐13, IL‐5, IL‐4, total and ovalbumin (OVA)‐specific immunoglobulin (Ig)E, and lung histopathology were evaluated. The gene discussed is IL4; the disease is airway hyperresponsiveness.