We observed no inflammatory change in the tracheal and brochial musosa of the healthy guineapigs,obvious inflammatory change of the asthmatic group, and slight inflammatory change of the CSA group.

• 透射电镜见健康组豚鼠气管与支气管粘膜上皮正常，哮喘组有明显炎性改变，CSA组改变轻微。