Detection of indoor and outdoor avian antigen in management of bird-related hypersensitivity pneumonitis.
BACKGROUND
In the management of hypersensitivity pneumonitis (HP), antigen avoidance is crucial to prevent the progression of disease. Indirect and unrecognized exposure to the antigen may continue for a long time if persistence of the causative antigen is not recognized. To make a correct assessment of the patients' environment, we tried to establish the methods to detect indoor and outdoor avian antigens.


METHODS
Sixteen patients with bird-related HP, 4 asymptomatic breeders, and 6 healthy controls were examined. We prepared anti-pigeon dropping extracts (PDE) polyclonal antibody from rabbits. Air samples and house dust samples were analyzed by an antigen-capture ELISA with signal amplification using catalyzed reporter deposition.


RESULTS
In air samples, avian antigen could be detected in patients with HP (0.73 +/- 0.53 ng/m3) and asymptomatic breeders (0.63 +/- 0.23 ng/m3). In house dust samples, the amount of avian antigen was higher in patients with HP (2.4 +/- 1.8 microg/g) and asymptomatic breeders (4.1 +/- 2.3 microg/g) than in the controls (0.1 +/- 0.2 microg/g).


CONCLUSIONS
Detection of indoor and outdoor avian antigen might contribute to the correct diagnosis and appropriate managements of bird-related HP.
Kuramochi
Jin
J
Department of Integrated Pulmonology, Tokyo Medical and Dental University, Tokyo, Japan.
Inase
Naohiko
N
Takayama
Koji
K
Miyazaki
Yasunari
Y
Yoshizawa
Yasuyuki
Y
D000388:Air / Q000032:analysis; D016902:Air Pollution, Indoor / Q000009:adverse effects*; D000542:Alveolitis, Extrinsic Allergic / Q000175:diagnosis* / Q000453:epidemiology / Q000276:immunology* / Q000628:therapy; D000818:Animals; D030161:Avian Proteins / Q000737:chemistry* / Q000276:immunology; D010856:Columbidae / Q000276:immunology; D045424:Complex Mixtures; D004391:Dust / Q000032:analysis; D004781:Environmental Exposure / Q000009:adverse effects*; D004797:Enzyme-Linked Immunosorbent Assay; D005240:Feasibility Studies; D006801:Humans; D007159:Immunologic Tests / Q000379:methods; D011817:Rabbits
D030161:Avian Proteins; D045424:Complex Mixtures; D004391:Dust