What causes a runny nose in a child?
Last reviewed: 19.10.2021
All iLive content is medically reviewed or fact checked to ensure as much factual accuracy as possible.
We have strict sourcing guidelines and only link to reputable media sites, academic research institutions and, whenever possible, medically peer reviewed studies. Note that the numbers in parentheses ([1], [2], etc.) are clickable links to these studies.
If you feel that any of our content is inaccurate, out-of-date, or otherwise questionable, please select it and press Ctrl + Enter.
The main pathogens of acute rhinopharyngitis (rhinitis) are viruses. These are primarily rhinoviruses (45% of all cases), less often - PC virus, ECHO viruses, coronaviruses, parainfluenza viruses and adenoviruses, as well as influenza B viruses.
Bacterial pathogens are less common, but still cause a rhinopharyngitis (a common cold). Of these, the most frequent are Mycoplasma pneumoniae, much less often Chlamydoia pneumoniae, even less often Ch. Psittaci.
Pathogenesis of acute rhinopharyngitis
Acute rhinopharyngitis (rhinitis) - acute inflammation of the nasal passages of the mucous membrane, as well as of the mucous membrane and lymphoid elements of the posterior pharyngeal wall, accompanied by edema of the tissues and increased separation of the mucous secretions, or, conversely, increased dryness of the mucous membranes.