A 42-year-old pigeon breeder presents with acute onset of fever (38.9°C), chills, and dyspnea 4 hours after cleaning his loft. Vitals show HR 110, RR 28, SpO2 88% on room air. Chest X-ray demonstrates diffuse ground-glass opacities bilaterally. PFTs reveal reduced FVC (65% predicted) with FEV1/FVC ratio of 78%. Serum IgG antibody to pigeon antigen is elevated. No recent medication use. Which of the following is the most likely diagnosis?
- A)Coccidioidomycosis
- B)Avian influenza
- C)Idiopathic pulmonary fibrosis
- D)Acute hypersensitivity pneumonitisGABARITO
- E)Atypical pneumonia
Explicação
Acute hypersensitivity pneumonitis (extrinsic allergic alveolitis) occurs within hours of antigen exposure (pigeon proteins/droppings). Presents with fever, dyspnea, and restrictive pattern with ground-glass opacities. Symptoms may resolve with antigen avoidan... Ver explicação completa e trilha adaptativa →