[Farmer’s lung disease caused by straw or hay? Case report].

The research article discusses a case study of a young woman who was diagnosed with farmer’s lung disease likely caused by the inhalation of organic dust from straw used in horse stables.

Introduction

• The study focuses on a young woman who was admitted to Akranes Regional Hospital displaying symptoms like dyspnea (difficulty in breathing), fatigue, and fever.
• Initial diagnosis showed that she was suffering from bilateral pneumonia, a condition marked by the inflammation of both lungs.
• The cause of her pneumonia at this point was not identified, and she was treated with antibiotics, leading to her recovery and subsequent discharge after eight days.

Progression of the Case

• Four weeks post-discharge, the woman experienced rapidly worsening dyspnea. Further tests showed she was hypoxemic, meaning there was an abnormally low level of oxygen in her blood.
• Additionally, spirometry tests indicated a restrictive lung pattern, suggesting that her lungs were unable to fully expand, thus affecting her ability to breathe.
• Her chest radiography findings revealed diffuse interstitial changes, denoting widespread abnormalities in the interstitial lung tissues which provide support to the lung’s alveoli.

Further Investigations and Diagnosis

• A computerized tomography (CT) scan of her lungs showed diffuse ground-glass opacity changes, often associated with different types of lung diseases.
• Transbronchial biopsies from the lungs, a procedure that involves taking a tissue sample from the lungs through the bronchus, presented numerous small granulomas, which are small areas of inflammation in tissue.
• Taking into account these findings and her exposure to organic dust from straw in her work of stall-feeding horses, she was diagnosed with farmer’s lung disease, a type of hypersensitivity pneumonitis caused by inhaling dust from mouldy hay, straw, or grain.

Treatment and Recovery

• She was then treated with prednisolone, a type of steroid commonly used to reduce inflammation, for a short period.
• The woman showed excellent recovery following this treatment. The success of her treatment corroborated the diagnosis of farmer’s lung disease.

Conclusion

• This case study was significant as it pointed out the possibility of farmer’s lung disease occurring even outside the traditional farming context.
• It shows that organic dust from straw used in horse stables can potentially lead to the same condition and therefore this should be considered in differential diagnosis when dealing with similar cases.