Precipitins to inhaled avian antigens: Results of an inter-laboratory study


Dr K.-Ch. Bergmann, Department of Clinical Immunology, Research Institute for Lung Diseases, Karower Sir 11, 1115 Berlin, East Germany.


Precipitins against avian antigens in sera from patients with extrinsic allergic alveolitis, asymptomatic pigeon and chicken breeders and from control individuals were tested with different antigen extracts in six laboratories by a variety of different methods. Eighty percent of the results coincided in identifying the positive sera from patients and 90% in identifying the controls. It seems possible therefore to exchange results among experienced laboratories with fair confidence.