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

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Abstract
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 6 laboratories by a variety of different methods. Of the results, 80% coincided in identifying the positive sera from patients and 90% in indentifying the controls. It seems possible therefore to exchange results among experienced laboratories with fair confidence.