Management of Acute Viral Upper Respiratory Infection

Diagnosis and Risk Assessment

The American College of Physicians suggests that a 1 pack-per-day smoking history increases the risk for bacterial superinfection, but does not automatically warrant antibiotics at day 4 of symptoms 1, 2
Bacterial co-infection in viral respiratory illness occurs in only 3.5% of cases upon initial presentation, as reported by the European Society of Clinical Microbiology and Infectious Diseases 1, 2, 3

The Infectious Diseases Society of America recommends considering empirical antibiotics if the patient develops fever with purulent sputum production, suggesting bacterial superinfection 4
Clinical deterioration after initial improvement is a red flag requiring antibiotic consideration, according to the European Respiratory Society 1
Signs of pneumonia, such as focal consolidation on exam, hypoxemia, or infiltrate on chest imaging, warrant antibiotic use, as suggested by the American College of Chest Physicians 5

The British Medical Journal recommends honey as first-line therapy for cough in patients over 1 year old 7
Paracetamol is preferred over NSAIDs for symptomatic relief of fever, according to the National Institute for Health and Care Excellence 7

The Centers for Disease Control and Prevention suggest obtaining sputum and blood cultures before starting antibiotics 5, 1
The European Society of Clinical Microbiology and Infectious Diseases recommends stopping antibiotics if cultures are negative at 48 hours and the patient is improving 1, 2
Procalcitonin levels <0.5 ng/mL support withholding or stopping antibiotics, as reported by the American Thoracic Society 5, 9

The American College of Chest Physicians recommends azithromycin 500 mg day 1, then 250 mg daily for days 2-5, as an empirical antibiotic choice for community-acquired pneumonia 5
Alternative antibiotic choices include amoxicillin-clavulanate or respiratory fluoroquinolone, according to the Infectious Diseases Society of America 5, 8