Stephen J. Schueler, M.D.

Sinus Infection Types

Two main types of sinusitis include:

  • Acute sinusitis
  • Chronic sinusitis

Acute Sinusitis
A person who has had symptoms of sinusitis for less than 3 weeks has acute sinusitis. Viruses are the most common cause for acute sinusitis, but some cases are caused by bacteria.

Common bacterial causes of sinusitis:
  • Moraxella (Branhamella) catarrhalis
  • Haemophilus influenzae
  • Staphylococcus aureus
  • Streptococcus pneumoniae
  • Streptococcus pyogenes

Chronic Sinusitis
A person who has had symptoms of sinusitis for more than 3 weeks has chronic sinusitis. It is most common in those who have persistent nasal congestion caused by allergies. Mold is a common cause of nasal allergies and chronic sinusitis.

Continue to Sinus Infection Anatomy

Last Updated: Nov 30, 2010 References
Authors: Stephen J. Schueler, MD; John H. Beckett, MD; D. Scott Gettings, MD
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PubMed Sinus Infection References
  1. Brook I. Microbiology and antimicrobial management of sinusitis. J Laryngol Otol. 2005 Apr;119(4):251-8. [15949076]
  2. Klossek JM, Federspil P. Update on treatment guidelines for acute bacterial sinusitis. Int J Clin Pract. 2005 Feb;59(2):230-8. [15854202]
  3. Mortimore S, Wormald PJ. Management of acute complicated sinusitis: a 5-year review. Otolaryngol Head Neck Surg. 1999 Nov;121(5):639-42. [10547486]
  4. Oxford LE, McClay J. Complications of acute sinusitis in children. Otolaryngol Head Neck Surg. 2005 Jul;133(1):32-7. [1602504]
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