Common Cold Viruses: Causative Agents and Treatment

Viral Etiology

Rhinoviruses account for 30-80% of common colds and represent the most important viral group, with at least 89 different antigenic types, according to the American Academy of Otolaryngology-Head and Neck Surgery 1, 2
Human coronaviruses cause approximately 15% of colds, as reported by the Journal of Environmental Sciences (China) 1
Respiratory syncytial virus (RSV) is responsible for 10-15% of cases, as stated by the Journal of Environmental Sciences (China) 1
Adenoviruses cause about 5% of colds, according to the Journal of Environmental Sciences (China) 1
Influenza and parainfluenza viruses are also implicated in common cold syndrome, as reported by the American Academy of Otolaryngology-Head and Neck Surgery and the American College of Chest Physicians 2, 3

The common cold viruses spread through multiple routes including airborne droplets from coughing/sneezing, direct hand contact, and contact with contaminated surfaces, as stated by the Journal of Environmental Sciences (China) 1
Direct hand contact is the most efficient transmission route, making handwashing the best prevention method, according to the American College of Physicians 4
The viral infection triggers an inflammatory cascade rather than causing direct tissue destruction, as reported by the American Academy of Otolaryngology-Head and Neck Surgery 3

Antibiotics should never be prescribed for the common cold as they provide no benefit and increase risk of adverse effects, as stated by the American College of Physicians 4
First-generation antihistamine plus decongestant combinations provide significant symptom relief in 1 in 4 patients, according to the American College of Physicians and the American Academy of Family Physicians 4, 5
Zinc (acetate or gluconate) reduces symptom duration if started within 24 hours of onset, though may cause nausea and bad taste, as reported by the American College of Physicians 4
Intranasal ipratropium bromide is effective for rhinorrhea, according to the American College of Physicians and the American Academy of Family Physicians 4, 5

Symptoms typically last up to 2 weeks, and patients should be counseled that this duration is normal, as stated by the American College of Physicians 4
Approximately 85-98% of primary care physicians prescribe antibiotics for clinically suspected rhinosinusitis, but most cases are viral and do not require antibiotics, as reported by the American Academy of Otolaryngology-Head and Neck Surgery 3