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The causes of upper airway obstructions can be acute or chronic. More acute causes of upper airway obstruction include foreign body aspiration, blunt trauma to the neck, infections, and swelling due to allergies or other inflammatory conditions. [3] In children, viral infections such as croup or epiglottitis are frequent causes. [4]
Lower respiratory tract infection (LRTI) is a term often used as a synonym for pneumonia but can also be applied to other types of infection including lung abscess and acute bronchitis. Symptoms include shortness of breath , weakness, fever , coughing and fatigue. [ 3 ]
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.
Viruses that cause respiratory infections are affected by environmental conditions like relative humidity and temperature. Temperate climate winters have lower relative humidity, which is known to increase the transmission of influenza. [29] Of the viruses that cause respiratory infections in humans, most have seasonal variation in prevalence.
Epiglottitis is a bacterial infection of the larynx which causes life-threatening swelling of the epiglottis with a mortality rate of 7% in adults and 1% in children. [10] Haemophilus influenzae is still the primary cause even with vaccinations. Also Streptococcus pyogenes can cause epiglottitis.
Trauma can also be a cause for chest pain and has been found to be associated with the pain in 5% of the patients. [1] Children can present with chest pain can have a sudden onset related to vigorous physical activity and coughing. These symptoms seem to be closely associated with asthma. [1] Infection with Haemophilus influenzae can cause ...
Pneumonia is the most common hospital-acquired infection that causes death. [29] Before the advent of antibiotics, mortality was typically 30% in those that were hospitalized. [22] However, for those whose lung condition deteriorates within 72 hours, the problem is usually due to sepsis. [41]
Croup (/ k r uː p / KROOP), also known as croupy cough, is a type of respiratory infection that is usually caused by a virus. [2] The infection leads to swelling inside the trachea, which interferes with normal breathing and produces the classic symptoms of "barking/brassy" cough, inspiratory stridor and a hoarse voice. [2]