Accepted
at 1:39 a.m. May, 30, 2025
by
Cameron
Author:
andrewmathias8
Type of change:
New Tags
Rationale for change
Q describes 16 yo F with fever, malaise, shortness of breath, chest tightness, and nonproductive cough during farm summer camp working with cattle. Mom notes that this has happened to the patient before. Fine crackles on exam. You need to deduce that this patient has hypersensitivity pneumonitis in order to correctly answer that the CXR most likely shows "bilateral interstitial opacities" (as opposed to other CXR findings)
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Text
What is the likely diagnosis in a patient with repeated episodes of fever, dyspnea, and cough after exposure to environmental antigens (e.g., farmers, bird droppings, molds)?
{{c1::Hypersensitivity pneumonitis}}
Extra
- Acute episodes → SOB, cough within hours of exposure
- Chronic → weight loss, clubbing, honeycombing of the lung
| Diseases | Causative Agent | Source |
|---|---|---|
| Hot tub lung | Mycobacterium avium complex | Mist from hot tubs |
| Suberosis | Penicillum glabrum | Moldy cork dust |
| Bird fancier's (pigeon breeder's) lung | Avian proteins | Feathers / bird droppings |
| Bagassosis | Thermophilic Actinomycetes | Pressed sugarcane |
| Cheese washer's lung | P. roqueforti | Cheese casings |
| Farmer's lung | Thermophilic Actinomycetes, Aspergillus, Saccharopolyspora rectivirgula | Moldy hay |
| Humidifier lung | Bacillus subtilus / cereus, Naegleria gruberi | Mist generated by a machine from standing water |
Lecture Notes
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Missed Questions
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Pathoma
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Boards and Beyond
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First Aid
Sketchy
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Sketchy 2
Watch Approach to Cough
Watch Approach to Cough
Sketchy Extra
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Picmonic
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Pixorize
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Physeo
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Bootcamp
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OME
Additional Resources
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One by one
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