Pulmonary Nocardia farcinica Infection in a Non-immunocompromised Patient With Fibrotic Nonspecific Interstitial Pneumonia (NSIP).

Pulmonary nocardiosis is a rare and often overlooked infection, particularly in individuals without classical immunosuppression. This report describes an unusual presentation of pulmonary infection in a patient with fibrotic interstitial lung disease and a significant history of occupational exposure to aluminum fumes. A 56-year-old male patient presented with progressive respiratory symptoms and hemoptysis, ultimately diagnosed through microbiological culture. Clinical improvement followed targeted antibiotic therapy. This case highlights the importance of considering atypical infections in patients with chronic lung conditions and environmental exposures.