Acute Upper Respiratory Infection

📚Definitions 

Upper Respiratory Infection (URI): Otherwise known as the “common cold, ” URIs are self-limited inflammation of the upper airways characterized by nasal congestion and discharge (rhinorrhea), sneezing, sore throat, cough, occasionally with low-grade fever, headache, and malaise. URIs are, by definition, viral in etiology and as such are a separate and distinct entity distinguishable from bacterial pharyngitis, acute bacterial sinusitis, allergic rhinitis, and pertussis. While symptoms may overlap with other viral conditions such as influenza and acute bronchitis, they are distinct entities involving the upper airways and caused by a group of known non-influenza viruses.

🗺️ Overview

Viruses are the most commonly identified pathogen in acute URIs. Rhinoviruses, which include more than 100 serotypes, are the most common viruses associated with cold symptoms and collectively cause 30 to 50% of colds. Coronaviruses cause about 10 to 15% of common colds.

In infants and young children, URI symptoms usually peak on day 2 to 3 of illness and then gradually improve over 10 to 14 days. The cough may linger in a minority of children but should steadily resolve over three to four weeks. In older children and adolescents, symptoms usually resolve in 5-7 days (longer in those with underlying lung disease or who smoke cigarettes) but may last up to two weeks.

🚨 Important History

• Nature of symptoms: Duration, severity

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  • Character of rhinorrhea (thickness/color indicates immune cell enzymes, not bacteria)
  • Character of cough (dry, wet, productive, wheezing, nighttime awakening)
  • Fever, facial pressure, headache, sore throat, nasal congestion, sinus pain

• Patient factors: Age, tobacco use, past medical history (allergies, asthma, COPD, immunocompromise), current medications, sick contacts, travel history, pregnancy/nursing status

📄 Examination 

• Vitals and general appearance: Document fever, ill/toxic appearance, lethargy, mental status
• Respiratory: Nasal rhinorrhea/congestion, forced exhalation/cough (assess for wheezing/stridor), voice quality (hoarse/nasal)
• Throat/pharynx: Erythema, swelling if sore throat present
• Other: Conjunctival injection, rashes

🎯 Diagnosis 

Clinical diagnosis based on symptoms/signs:

• URI features: Rhinorrhea, nasal congestion, pharyngeal erythema, minimal adenopathy, clear lung exam.
• Differential diagnosis:
  • Allergic rhinitis: No sore throat/cough.
  • Bacterial pharyngitis: Tonsillar swelling, absence of rhinorrhea.
  • COVID-19: History of exposure, anosmia/ageusia, progressive dyspnea. Testing recommended during moderate/high community transmission.

💆 Treatment 

1. Antibiotic stewardship:

   1. Not indicated for viral URIs. Educate patients on risks (e.g., C. difficile, resistance).

       

2. Symptom management:
   • Pain/fever: Ibuprofen (preferred) or acetaminophen.
   • Nasal congestion: Adults/children >12: Antihistamine/decongestant combinations (limit to 5 days); intranasal steroids or cromolyn sodium as alternatives.

   • Cough: Adults: Dextromethorphan, throat lozenges, honey, hot tea.

      

3. Special considerations:
   • High-risk patients: Refer for in-person evaluation if hypoxic, worsening symptoms, or comorbidities (e.g., COPD).

 🔮 Follow Up 

• Self-limited; no routine follow-up needed unless symptoms persist beyond 7–10 days (cough may last 3 weeks).
• Urgent referral if red flags (e.g., dyspnea, hypoxia).

📘 Coding

ICD-10: J06.9 (Acute URI)

If you have any questions or would like more information, please reach out to the Delegating Physician.