[Eosinophil activation markers in status asthmaticus]. 
Eosinophil activation markers-eosinophil cationic protein, eosinophil protein-X-were investigated in acute severe asthma.  The elevation of the eosinophil activity markers were found in every cases at the time of admission.  The measurements were repeated eight days later.  The eosinophil cationic protein and eosinophil protein-X levels were increased at the time of the admission, and a decreasing tendency was detected eight days later.  The peak expiratory flow rates were monitored during the period of the hospital staying.  It is important to note that, the size of the bronchial obstruction did not show any similarity in all cases comparing to the elevation or decrease of eosinophil activity markers.  The authors proved the eosinophil activation in vivo in acute severe asthma.  The continuous monitor of the eosinophil activity markers might have a practical value in searching of the optimal therapeutic modalities in the asthmatic patients.