Infection

• HIV
• Aspergillosis

Allergic

• Asthma & allergic rhinitis
• ABPA & allergic fungal sinusitis

Idiopathic

• Wegener's granulomatosis
• Churg-Strauss syndrome

Altered defenses

• Cystic fibrosis
• Immotile cilia syndrome
• Common variable immunodeficiency
• IgA deficiency
• IgG subclass deficiency
• Complement deficiency