Aspergillosis
Condition
Definition
Aspergillosis is an infection or reaction due to a common type of fungus. It can lead to severe lung problems.
There are several types:
- Pulmonary—Mainly affects people with long term lung problems
- Invasive—Travels from the lungs to the bloodstream to cause a serious infection that may affect other organs
- Allergic—Inflames airways due to an allergy to the fungus
Causes
Aspergillosis is caused by a type of fungus that is found on soil, plants, and rotting vegetables. Spores from the fungus can be released into the air and inhaled into the lungs. The immune system gets rid of the fungus in most people. Aspergillosis happens if the immune system is not working properly and cannot remove it. The fungus is able to grow and cause an infection.
In some people the fungus causes an allergic reaction.
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Risk Factors
Things that raise the risk of aspergillosis are:
- Having a weakened immune system from:
- HIV/AIDS
- Severe COVID-19
- Medicines taken to suppress the immune system
- Certain cancer treatments
- A lack of white blood cells or ones that do not work as they should to fight infection
- Long term lung diseases, such as:
- Asthma
Things that raise the risk of the allergic type are:
- A personal or family history of:
- Asthma, hay fever, and eczema
- Cystic fibrosis
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Symptoms
Symptoms may include:
- A wet cough that lasts a long time
- Coughing up blood
- Fever
- Wheezing or problems breathing
- Chest pain
Diagnosis
The doctor will ask about symptoms and past health. A physical exam will be done. An infection will be suspected based on symptoms. Blood, urine, and coughed up fluids may also be tested. They can help to find the cause of the infection. The results will help to guide treatment.
The doctor may also need to see how much of the lung is involved. Tests may include:
- Chest x-ray
- CT scan
- MRI scan
- Bronchoscopy—to look at lung tissue or remove tissue for testing
Treatment
The goal of treatment is to clear the infection or inflammation. A second goal will be to lower the risk of long term harm to the lungs or organs. Treatment may include:
- Medicines to treat the fungal infection
- Steroids by mouth or inhaled to treat an allergic reaction
- Surgery to remove a large mass of fungus
Prevention
The fungus that causes aspergillosis is everywhere. People at high risk of infection should:
- Avoid close contact with soil or compost
- Avoid construction and renovation sites
- Take steps to keep their homes free from mildew
American Lung Association
Centers for Disease Control and Prevention
CANADIAN RESOURCES:
Health Canada
The Lung Association
American Lung Association
Centers for Disease Control and Prevention
CANADIAN RESOURCES:
Health Canada
The Lung Association
References
- Allergic brocnhopulmonary aspergillosis. EBSCO DynaMed website. Available at: https://www.dynamed.com/condition/allergic-bronchopulmonary-aspergillosis.
- Aspergillosis. Cleveland Clinic website. Available at: https://my.clevelandclinic.org/health/diseases/14770-aspergillosis.
- Cadena J, Thompson GR 3rd, et al. Aspergillosis: epidemiology, diagnosis, and treatment. Infect Dis Clin North Am. 2021;35(2):415-434.
- Chronic pulmonary aspergillosis. EBSCO DynaMed website. Available at:https://www.dynamed.com/condition/chronic-pulmonary-aspergillosis.
- Invasive aspergillosis. EBSCO DynaMed website. Available at: https://www.dynamed.com/condition/invasive-aspergillosis.
Contributors
- David L. Horn, MD, FACP
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