Objective To detect the level of serum eosinophil cationic protein (ECP) and FX5E in Children with Bronchiolitis, and to explore the possible relationship between ECP and FX5E.

• 目的 检测毛细支气管炎患儿血清嗜酸细胞阳离子蛋白（ECP）和食物过敏原（FX5E）的水平及探讨它们之间的关系。