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Farmer's Lung Differential Diagnoses

  • Author: Laurianne G Wild, MD, FAAAAI, FACAAI; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
Updated: Dec 21, 2015

Diagnostic Considerations

Differential diagnosis of farmer's lung depends on the amount, intensity, duration, and frequency of exposure and on the stage of disease at clinical presentation. Diagnostic considerations include the following:

  • Acute hypersensitivity pneumonitis due to farmer's lung
  • Pulmonary edema
  • Bronchoalveolar cell carcinoma
  • Organic dust toxic syndrome
  • Chronic farmer's lung
  • Congestive heart failure
  • Desquamative interstitial pneumonitis
  • Respiratory bronchiolitis - Interstitial lung diseases
  • Chemotherapeutic agents
  • Radiation
  • Inhaled toxins
  • Pneumoconioses
  • Toxic fume bronchiolitis (eg, caused by sulfur dioxide, nitrogen dioxide, ammonia, chlorine, phosgene, ozone)
  • Grain fever
  • Chronic bronchitis

Differential Diagnoses

Contributor Information and Disclosures

Laurianne G Wild, MD, FAAAAI, FACAAI Chief and Professor of Clinical Medicine, Section of Clinical Immunology, Allergy and Rheumatology, Director, Allergy and Immunology Fellowship Training Program, Tulane University School of Medicine; Director, Allergy and Immunology Clinic, Southeast Louisiana Veterans Health Care System of New Orleans

Laurianne G Wild, MD, FAAAAI, FACAAI is a member of the following medical societies: Alpha Omega Alpha, American Academy of Allergy Asthma and Immunology, American College of Allergy, Asthma and Immunology, Association of Subspecialty Professors

Disclosure: Nothing to disclose.


Eduardo E Chang, MD Fellow, Department of Allergy and Immunology, Tulane University

Disclosure: Nothing to disclose.

Specialty Editor Board

Francisco Talavera, PharmD, PhD Adjunct Assistant Professor, University of Nebraska Medical Center College of Pharmacy; Editor-in-Chief, Medscape Drug Reference

Disclosure: Received salary from Medscape for employment. for: Medscape.

Chief Editor

Zab Mosenifar, MD, FACP, FCCP Geri and Richard Brawerman Chair in Pulmonary and Critical Care Medicine, Professor and Executive Vice Chairman, Department of Medicine, Medical Director, Women's Guild Lung Institute, Cedars Sinai Medical Center, University of California, Los Angeles, David Geffen School of Medicine

Zab Mosenifar, MD, FACP, FCCP is a member of the following medical societies: American College of Chest Physicians, American College of Physicians, American Federation for Medical Research, American Thoracic Society

Disclosure: Nothing to disclose.

Additional Contributors

Sat Sharma, MD, FRCPC Professor and Head, Division of Pulmonary Medicine, Department of Internal Medicine, University of Manitoba; Site Director, Respiratory Medicine, St Boniface General Hospital

Sat Sharma, MD, FRCPC is a member of the following medical societies: American Academy of Sleep Medicine, American College of Chest Physicians, American College of Physicians-American Society of Internal Medicine, American Thoracic Society, Canadian Medical Association, Royal College of Physicians and Surgeons of Canada, Royal Society of Medicine, Society of Critical Care Medicine, World Medical Association

Disclosure: Nothing to disclose.


Gregg T Anders, DO Medical Director, Great Plains Regional Medical Command , Brooke Army Medical Center; Clinical Associate Professor, Department of Internal Medicine, Division of Pulmonary Disease, University of Texas Health Science Center at San Antonio

Disclosure: Nothing to disclose.

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