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Related Experiment Videos

Feather duvet lung.

Naohiko Inase¹, Yoshio Ohtani, Junji Endo

¹The Pulmonary Medicine, Tokyo Medical and Dental University Tokyo, Japan.

Medical Science Monitor : International Medical Journal of Experimental and Clinical Research

|May 23, 2003

Summary

Bird fancier's lung (BFL), a type of hypersensitivity pneumonitis, can be caused by feather antigens. This case highlights chronic BFL from a feather duvet, emphasizing the need for physician awareness.

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Area of Science:

Pulmonology
Immunology
Environmental Medicine

Background:

Bird fancier's lung (BFL) is a hypersensitivity pneumonitis triggered by avian antigens.
Diagnosis of BFL from feathers is challenging as feathers are not commonly recognized as causative agents.
Chronic BFL can present as pulmonary fibrosis.

Observation:

A 73-year-old woman with exertional dyspnea over three years.
History of pigeon exposure and prolonged use of a feather duvet.
Radiographic findings included peripheral reticular infiltrates and HRCT showing consolidation, micronodules, and ground-glass opacities.

Findings:

Positive lymphocyte proliferation to feather antigen and a positive bird antigen inhalation provocation test.
Histopathology consistent with chronic hypersensitivity pneumonitis.

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Spontaneous clinical improvement after discontinuing feather duvet use.

Implications:

Feather bedding (duvets, pillows) is increasingly popular globally.
Physicians must consider feathers as a potential cause of BFL.
Increased prevalence of feather-induced BFL necessitates greater clinical awareness.