SummaryA preliminary report is given of some studies concerning Imcterial vaccines in arthmatic children. A method is introduced in which nasal eosinophilia is studied in connection with local applications of bacterial vaccines and controls. A reproducable positive response is found in three patients of a selected group suffering from pmumed “bacterial allergy”. In two of these patients focal mthmatir reactions are observed following the injection of minute doses of the vaccine in question. The method is briefly discus