based on the experiences with 1,500 infants and children , hospitalized during a five-year period , who had undergone clinical , routine laboratory , immunological bacteriological , allergological , x-ray , oto-rhino-laryngological , spirometrical and bronchological examinations performed by unchanging teams using the same methods and instruments , it was found that the cause of respiratory diseases in a comparatively high number of patients were developmental anomalies , that it is important to look for tracheal stenoses , that there is chronic bronchitis in infants and children , that sinusitis maxillaris or shortage of immunoglobulins are relatively rare , and that selective bacteriological cultures are not very often positive .
C0021270
infants
C0008059
children