What is it?
Aspergillus pneumonia is a rare but serious lung infection caused by breathing in spores of the Aspergillus mould (most often Aspergillus fumigatus). Unlike allergic conditions such as Allergic Bronchopulmonary Aspergillosis (ABPA) or Aspergillus bronchitis, which affect the airways, Aspergillus pneumonia occurs when the fungus actually invades lung tissue. This makes it a more dangerous condition.
How do people catch it?
Most cases are acquired in the community (outside hospital).
You may be at higher risk if you have:
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A weakened immune system (chemotherapy, transplant, high-dose steroids, uncontrolled diabetes).
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Chronic lung disease such as COPD or emphysema.
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A very heavy exposure to fungal spores (compost heaps, rotting bark, mulch, or farming dust).
Almost all cases are due to Aspergillus fumigatus, though other species like A. flavus have also been reported.
How common is it?
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Aspergillus pneumonia is uncommon, despite Aspergillus spores being everywhere in the environment.
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It is most often seen in people with weak immune defences, long-term lung disease, or very high exposure.
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Because it often looks like ordinary bacterial or viral pneumonia, it can be missed or diagnosed late.
Symptoms
The illness may start like a regular chest infection:
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Cough (dry or with sputum)
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Shortness of breath
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Fever or chills
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Chest pain
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Fatigue
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Sometimes coughing up blood
It may progress:
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Slowly over weeks, with cavities (holes) forming in the lungs.
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Very quickly, especially after flu, COVID-19, or high spore exposure.
How does it differ from other Aspergillus conditions?
| Condition | What’s happening | Who gets it | Key signs |
|---|---|---|---|
| Aspergillus Pneumonia | Fungus invades lung tissue (serious infection) | Immunocompromised patients, COPD, heavy spore exposure | Pneumonia-like illness: fever, cough, breathlessness, chest pain |
| ABPA | Allergy to Aspergillus spores causes airway inflammation | People with asthma or cystic fibrosis | Wheeze, thick mucus plugs, recurrent asthma attacks |
| Aspergillus Bronchitis | Fungus grows in widened/damaged airways without invading tissue | People with bronchiectasis or chronic airway disease | Chronic cough, mucus, sometimes blood streaks |
👉 In short:
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Pneumonia = infection inside lung tissue (dangerous, urgent).
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ABPA = allergic reaction in the lungs.
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Bronchitis = long-term airway infection.
Is it a type of invasive aspergillosis?
Yes. Aspergillus pneumonia is considered a form of invasive aspergillosis because the fungus invades lung tissue:
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Acute/severe form: fast, aggressive illness in very vulnerable people (immunocompromised, post-viral, heavy spore exposure).
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Subacute or “necrotising” form: slower, smouldering infection in people with COPD, diabetes, or long-term steroids, often with cavities.
👉 It is not mild like ABPA or bronchitis — it requires antifungal treatment.
Diagnosis
Doctors may use:
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Chest X-ray or CT scan – patches, cavities, or diffuse shadowing.
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Sputum or bronchoscopy samples – to detect Aspergillus in culture or under the microscope.
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Blood tests – for Aspergillus antibodies, or sometimes antigen (galactomannan).
Treatment
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Antifungal medicines are the main treatment (voriconazole is most common; sometimes itraconazole or posaconazole).
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Corticosteroids may be added in severe “pneumonitis-type” illness with overwhelming inflammation.
If treatment begins early, many people respond well. If diagnosis is delayed, the illness can progress rapidly and be life-threatening.
Outlook
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Without antifungal treatment, Aspergillus pneumonia can be fatal.
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With modern antifungal drugs, survival and recovery are possible.
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Some people may develop long-term lung damage, even after successful treatment.
Key message for patients
If you have sudden worsening cough, fever, or chest symptoms that don’t improve with antibiotics — especially if you have COPD, are on steroids, or have had heavy spore exposure — ask your doctor whether Aspergillus pneumonia should be considered. Early diagnosis and treatment make the best outcomes possible.
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