ABPA is caused by an allergic reaction to inhaled AF. AF is a common fungus. It grows and flourishes in decaying vegetation, soil, certain foods, dust, and water. The allergic reaction worsens respiratory symptoms in people with
. The inhaled AF colonizes mucus in the lungs, causing:
- Sensitization to AF
- Recurring allergic inflammation of the lungs
- Packing of the alveoli (tiny air sacs in the lungs) with eosinophils (a type of white blood cell involved in certain allergic reactions and infections with parasites)
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