causes of persistent or recurrent sinusitis

Etiology

• chronic infectious sinusitis
  • Streptococcus
    • Peptococcus
    • Peptostreptococcus
  • Bacteroides
  • Fusobacterium
  • Staphylococcus
• nasal polyposis (chronic hyperplastic sinusitis)
  • 50% of cases are associated with aspirin sensitivity
  • affected patients frequently have asthma
• fungal sinusitis
  • mucormycosis
  • allergic fungal sinusitis
    • Aspergillus fumigatus
    • Bipolaris australiensis
    • Alternaria alternata
• contributing factors
  • allergic rhinitis
  • viral upper respiratory tract infection
  • ciliary dyskinesia
  • Wegener's granulomatosis
  • hypogammaglobulinemia
  • tumor
  • cystic fibrosis
  • immunodeficiency
  • Down's syndrome
  • trauma/barotrauma
  • dental infection
  • aspirin sensitivity
  • deviated nasal septum