Upper Respiratory Infection: Symptoms & Signs

Upper respiratory infections (URI) are very common and include the common cold and flu. An upper respiratory infection is defined as an infection of any of the structures of the upper respiratory tract: the sinuses, nasal passages, pharynx, and larynx. Examples of specific types of upper respiratory infection include rhinitis (inflammation of the nasal cavity), sinusitis (sinus infection), nasopharyngitis (inflammation of the nasal cavity, pharynx, hypopharynx, uvula, and tonsils), pharyngitis (inflammation of the pharynx, uvula, and tonsils), laryngitis (inflammation of the larynx), and epiglottitis (inflammation of the upper portion of the larynx or the epiglottis). Viruses cause most upper respiratory infections, although bacteria and fungi can also infect these areas.

Other upper respiratory infection symptoms and signs

SLIDESHOW

COPD Foods to Boost Your Health - COPD Diet Tips See Slideshow

Subscribe to MedicineNet's Allergy and Asthma Newsletter

By clicking "Submit," I agree to the MedicineNet Terms and Conditions and Privacy Policy. I also agree to receive emails from MedicineNet and I understand that I may opt out of MedicineNet subscriptions at any time.

Medically Reviewed on 9/10/2019
References
Kasper, D.L., et al., eds. Harrison's Principles of Internal Medicine, 19th Ed. United States: McGraw-Hill Education, 2015.
CONTINUE SCROLLING FOR RELATED SLIDESHOW