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  2. Upper respiratory tract infection - Wikipedia

    en.wikipedia.org/wiki/Upper_respiratory_tract...

    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. [5]: 28 ...

  3. Respiratory tract infection - Wikipedia

    en.wikipedia.org/wiki/Respiratory_tract_infection

    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 ...

  4. Pneumonia - Wikipedia

    en.wikipedia.org/wiki/Pneumonia

    Pneumonia frequently starts as an upper respiratory tract infection that moves into the lower respiratory tract. [54] It is a type of pneumonitis (lung inflammation). [55] The normal flora of the upper airway give protection by competing with pathogens for nutrients.

  5. Sinusitis - Wikipedia

    en.wikipedia.org/wiki/Sinusitis

    Sinusitis (or rhinosinusitis) is defined as an inflammation of the mucous membrane that lines the paranasal sinuses and is classified chronologically into several categories: [22] Acute sinusitis – A new infection that may last up to four weeks and can be subdivided symptomatically into severe and nonsevere.

  6. Respiratory disease - Wikipedia

    en.wikipedia.org/wiki/Respiratory_disease

    Chronic respiratory diseases are long-term diseases of the airways and other structures of the lung. They are characterized by a high inflammatory cell recruitment (neutrophil) and/or destructive cycle of infection, (e.g. mediated by Pseudomonas aeruginosa). Some of the most common are asthma, chronic obstructive pulmonary disease, and acute ...

  7. Tracheitis - Wikipedia

    en.wikipedia.org/wiki/Tracheitis

    One of the most common causes is Staphylococcus aureus and often follows a recent viral upper respiratory infection. Bacterial tracheitis is a rare complication of influenza infection. [ 4 ] It is the most serious in young children, possibly because of the relatively small size of the trachea that gets easily blocked by swelling.

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