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Focused history
- Exact temperature pattern, chills/rigors, breathlessness, chest pain on breathing, wheeze, hemoptysis, sore throat/runny nose, headache/body aches.
- COVID/influenza exposure, smoking, asthma/COPD, TB contact, travel, comorbidities, and all drugs already used.
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Examination and basic measurements
- Temperature, pulse, respiratory rate, blood pressure, and oxygen saturation.
- Lung examination for focal crackles, bronchial breathing, or signs of consolidation.
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Investigations based on findings
- Chest X-ray if he is febrile/systemically unwell, has abnormal vital signs, low oxygen saturation, focal chest signs, pleuritic pain, or significant dyspnea.
- COVID-19 and influenza testing as appropriate to local circulation/exposure.
- CBC and other tests only if clinically indicated. Sputum culture is generally not routine for uncomplicated acute bronchitis.
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Treatment depends on diagnosis
- If examination and X-ray do not support pneumonia, this is often acute viral bronchitis: supportive care and follow-up, not routine antibiotics. Yellow/green sputum alone does not prove a bacterial infection.
- If pneumonia is confirmed or strongly suspected, a clinician should select an antibiotic based on severity, allergies, comorbidities, local resistance, and examination/X-ray findings. Do not self-start antibiotics.
- If cough becomes prolonged, especially over 2 weeks with paroxysms/whoop or post-cough vomiting, consider pertussis testing. Persistent cough with weight loss, night sweats, blood in sputum, or TB exposure also needs a different work-up.
Acute bronchitis can cause cough with sputum for days to weeks, but persistent fever warrants checking for pneumonia. The textbook notes that pneumonia is less likely when fever, tachycardia, tachypnea, hypoxia, and abnormal chest findings are absent, but this must be assessed in person.
Tintinalli's Emergency Medicine, p. 478. Similarly, the
Washington Manual advises chest radiography evaluation for febrile or systemically ill patients with abnormal vital signs.
The Washington Manual of Medical Therapeutics, p. 538. The
CDC outpatient guidance also advises ruling out pneumonia and states that colored sputum does not establish bacterial infection.