A patient has a deep productive cough with yellow-brown sputum, fever and chills. Which infection is most likely?

A patient has a deep productive cough with yellow-brown sputum, fever and chills. Which infection is most likely?

• A. Pneumonia
• B. Bronchitis
• C. Tuberculosis
• D. Lung Abscess

Answer: (A)

Differentiating acute bacterial pneumonia from other chest infections by symptom pattern. The combination of fever and chills with a deep, productive cough that yields purulent sputum points toward pneumonia, where the infection has reached the lung tissue and caused alveolar inflammation with consolidation. Sputum that is yellow-brown reflects pus and bacteria typical of bacterial pneumonia, and systemic fever supports an acute infectious process rather than a simpler airway irritation. In bronchitis, the inflammation is primarily in the airways, so cough and sputum can occur but fever is often absent or mild and there isn’t the same focal lung consolidation on exam or imaging. Tuberculosis tends to present more chronically, with a longer-lasting cough, weight loss, night sweats, and sometimes hemoptysis, rather than an abrupt fever with chills. A lung abscess would usually produce foul-smelling sputum and often shows a cavitary lesion on imaging, rather than the solid consolidation seen with pneumonia. So the fever plus a deep productive cough with purulent sputum fits pneumonia best, reflecting an acute bacterial infection of the lung parenchyma with consequent consolidation.

Differentiating acute bacterial pneumonia from other chest infections by symptom pattern. The combination of fever and chills with a deep, productive cough that yields purulent sputum points toward pneumonia, where the infection has reached the lung tissue and caused alveolar inflammation with consolidation. Sputum that is yellow-brown reflects pus and bacteria typical of bacterial pneumonia, and systemic fever supports an acute infectious process rather than a simpler airway irritation.

In bronchitis, the inflammation is primarily in the airways, so cough and sputum can occur but fever is often absent or mild and there isn’t the same focal lung consolidation on exam or imaging. Tuberculosis tends to present more chronically, with a longer-lasting cough, weight loss, night sweats, and sometimes hemoptysis, rather than an abrupt fever with chills. A lung abscess would usually produce foul-smelling sputum and often shows a cavitary lesion on imaging, rather than the solid consolidation seen with pneumonia.

So the fever plus a deep productive cough with purulent sputum fits pneumonia best, reflecting an acute bacterial infection of the lung parenchyma with consequent consolidation.