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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 .
Symptoms typically begin one to three days after exposure and last seven to ten days. [ 2 ] [ 3 ] [ 11 ] Strep throat is spread by respiratory droplets from an infected person, spread by talking, coughing or sneezing, or by touching something that has droplets on it and then touching the mouth, nose, or eyes.
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.
"Colds—upper respiratory infections—affect the upper airways and sometimes can bother the smaller airways much further down into the lungs where asthma occurs," Dr. Libbat-Tzion Shaham, MD, a ...
"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 ...
RSV, or respiratory syncytial virus infection, is a common illness that usually presents as a mild cold. Almost everyone has been infected with it by age 2, according to the CDC.
Influenza-like illness (ILI), also known as flu-like syndrome or flu-like symptoms, is a medical diagnosis of possible influenza or other illness causing a set of common symptoms. These include fever, shivering , chills , malaise , dry cough , loss of appetite , body aches, nausea , and sneezing typically in connection with a sudden onset of ...
An upper respiratory infection like the common cold, the flu, or COVID-19 Environmental irritants like smoke or dust A lower respiratory tract infections like bronchitis or pneumonia