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An upper respiratory tract infection (URTI) is an illness caused by an acute infection, which involves the upper respiratory tract, including the nose, sinuses, pharynx, larynx or trachea. [3] [4] This commonly includes nasal obstruction, sore throat, tonsillitis, pharyngitis, laryngitis, sinusitis, otitis media, and the common cold.
Pharyngitis is a type of upper respiratory tract infection. [7] Most cases are caused by a viral infection. [2] Strep throat, a bacterial infection, is the cause in about 25% of children and 10% of adults. [2] Uncommon causes include other bacteria such as gonococcus, fungi, irritants such as smoke, allergies, and gastroesophageal reflux disease.
Respiratory tract infections (RTIs) are infectious diseases involving the lower or upper respiratory tract. [1] An infection of this type usually is further classified as an upper respiratory tract infection (URI or URTI) or a lower respiratory tract infection (LRI or LRTI). Lower respiratory infections, such as pneumonia, tend to be far more ...
"Like other respiratory viruses, it causes upper respiratory infections. Most cases are mild, but infants, adults older than age 65, and those who are immunocompromised may have more serious ...
An upper respiratory infection like the common cold, the flu, or COVID-19 ... A lower respiratory tract infections like bronchitis or pneumonia. A chronic cough can also have a few potential ...
The distinction between viral upper respiratory tract infections is loosely based on the location of symptoms, with the common cold affecting primarily the nose (rhinitis), throat (pharyngitis), and lungs (bronchitis). [8] There can be significant overlap, and more than one area can be affected. [8] Self-diagnosis is frequent. [4]
The most common upper respiratory tract infection is the common cold. However, infections of specific organs of the upper respiratory tract such as sinusitis, tonsillitis, otitis media, pharyngitis and laryngitis are also considered upper respiratory tract infections. [citation needed]
Pneumonia frequently starts as an upper respiratory tract infection that moves into the lower respiratory tract. [55] It is a type of pneumonitis (lung inflammation). [56] The normal flora of the upper airway give protection by competing with pathogens for nutrients.
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