Acute Sinusitis Types
Two main types of sinusitis include:
- Acute sinusitis
- Chronic 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
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 Acute Sinusitis Anatomy
- Brook I. Microbiology and antimicrobial management of sinusitis. J Laryngol Otol. 2005 Apr;119(4):251-8. 
- Klossek JM, Federspil P. Update on treatment guidelines for acute bacterial sinusitis. Int J Clin Pract. 2005 Feb;59(2):230-8. 
- Mortimore S, Wormald PJ. Management of acute complicated sinusitis: a 5-year review. Otolaryngol Head Neck Surg. 1999 Nov;121(5):639-42. 
- Oxford LE, McClay J. Complications of acute sinusitis in children. Otolaryngol Head Neck Surg. 2005 Jul;133(1):32-7.