Sinusitis refers to inflammation of the paranasal sinuses. Sinusitis is classified as acute or chronic depending on duration of infection. It occurs when an undrained collection of pus accumulates in the sinus.
Causes of sinusitus include: Bacterial infection (H. influenzae, pneumococci, streptococci, catarrhalis), Viral infections, Fungal infections (Aspergillus, bipolaris, mucormycosis), Preceding upper respiratory infection.
Predisposing factors include chronic nasal edema, viscous mucous, polyps, nasal allergy, and sudden temperature changes.
RISK FACTORS include: allergic diathesis, Immunosuppression, Continuous positive airway pressure, Air travel during upper respiratory infection, Tooth abscess, and Swimming in contaminated water.
Culture for identification of infecting organism
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