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Sinusitis: Acute Sinusitis
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Sinusitis can be acute, lasting for less than four weeks, or chronic, lasting much longer. Acute sinusitis often starts as a cold, which then turns into a bacterial infection. Allergies, pollutants, nasal problems and certain diseases can ... cause sinusitis.
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Sinusitis is an inflammation of the mucous membranes lining the facial sinuses. The inflammation is often caused by a bacterial infection, although viruses and fungi are ... implicated. Immunocompromised people can develop bacterial or fungal sinusitis. Some allergic individuals, who are not immunocompromised, can have "allergic fungal sinusitis". Acute sinusitis lasts three to eight weeks. Sinusitis lasting more than eight weeks is considered chronic.
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Sinusitis is an inflammation of the sinuses. The sinuses are air-filled cavities lined with mucous membranes. The paranasal sinuses are located in the bones of the skull, and are connected with the nose. There are four groups of paranasal sinuses: the maxillary, which are located in the cheekbones on either side of the nose; the frontal, located right above the eyebrows; the ethmoid, located between the eyes and down to the bridge of the nose; and the sphenoid, located behind the ethmoids. Sinusitis can be chronic (lasting for a long period time and reoccurring) or acute (having a rapid onset, but a short, sometimes severe, course).
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Sinusitis is an acute or chronic inflammation of the nasal sinuses. The nasal sinuses are the hollow cavities found within the cheek bones and near the eyes. The inflammation of the nasal sinuses is usually triggered by inadequate draining due to allergies, infections or structural problems of the nose such as narrow drainage passages or a deviated septum.
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Sinusitis occurs when the sinuses are infected or inflamed. Sinusitis affects millions of Americans each year.2,3 Sinuses are hollow spaces in the bones around the nose and eyes that drain into the nose. When the sinuses cannot properly drain because of congestion or inflammation, fluid is trapped inside the sinus cavities.4 Fluid in the sinuses causes pressure, pain, and provides a place for bacteria or fungi to multiply. Sinusitis can be acute, lasting 3 to 8 weeks, or chronic, lasting more than 8 weeks.3 A chronic infection is more common and more severe in people with a weak immune system or who suffer from fungal infections.2
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Acute sinusitis is usually precipitated by an earlier upper respiratory tract infection, generally of viral origin. Virally damaged surface tissues are then colonized by bacteria, most commonly Haemophilus influenzae, Streptococcus pneumoniae, Moraxella catarrhalis and Staphylococcus aureus. Other bacterial pathogens include other streptococci species, anaerobic bacteria and, less commonly, gram negative bacteria. Another possible cause of sinusitis can be dental problems that affect the maxillary sinus. Acute episodes of sinusitis can ... result from fungal invasion. These infections are most often seen in patients with diabetes or other immune deficiencies (such as AIDS or transplant patients on anti-rejection medications) and can be life threatening.
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Acute Sinusitis