• Internal medicine · Jul 2022

    Case Reports

    A Case of Hypersensitivity Pneumonitis Caused by Exposure to a Gray Parrot (Psittacus erithacus).

    • Takanori Enomoto, Reina Sekiya, Hiroshi Sugimoto, Tomomi Terashita, Junya Yoshioka, Tatsuya Nagano, Yoshihiro Nishimura, Erika Yano, Tatsuya Moriyama, and Kyosuke Nakata.
    • Division of Respiratory Medicine, Konan Medical Center, Japan.
    • Intern. Med. 2022 Jul 15; 61 (14): 2197-2202.

    AbstractA 73-year-old woman complaining of cough and dyspnea was admitted to our hospital. High-resolution computed tomography chest revealed patchy ground-glass attenuation in the upper lung field. The patient suffered an asthma attack and was diagnosed with allergic pneumonitis; prednisolone was administered for treatment. Bird-related hypersensitivity pneumonitis was suspected, as she had a gray parrot (Psittacus erithacus) and a budgerigar (Melopsittacus undulatus) at home. An immunoblotting analysis with the patient's serum demonstrated IgG-binding fractions to the gray parrot's feathers only; no binding was noted with the budgerigar antigens. The patient was conclusively diagnosed with hypersensitivity pneumonitis related to exposure to a gray parrot.

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