Objective It is to observe the changes of lung function and eosinophil(EOS) in patients with bronchia asthma in acute-outbreak period and catabatic period, so to explore its clinical significance.

Eosinophilic gastroenteritis is a disease of unknown cause, characterized by diffuse or localized gastrointestinal eosinophil infiltration, often accompanied by peripheral blood eosinophilia syndrome.

AIM: to investigate differentiation of CD34 + cells in human umbilical blood into eosinophils under the condition of cell culture in vitro.