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Table 1 Serum IgG antibody (median and i-q range, μg/ml) against pigeon antigens quantified by fluorimetry in pigeon fanciers, and in healthy and pathological control subjects with no significant avian exposure.

From: Quantifying serum antibody in bird fanciers' hypersensitivity pneumonitis

  Pigeon fanciers Control subjects
   Healthy Pathologic
Number 50 21 17
Pigeon serum 37.7 0.01 2.5
  (4.9–133.0) (0.01-0.01) (0.01–8.9)
Pigeon feathers 128.0 0.01 3.8
  (33.2–250.0) (0.01–2.5) (1.00–4.7)
Pigeon droppings 202.5 21.9 28.2
  (59.8–250.0) (14.1–26.2) (19.1–42.8)