Chronic bronchitis with bacterial exacerbation

Chronic bronchitis with bacterial exacerbation is an acute, clinically significant worsening of lower respiratory tract symptoms in individuals with preexisting chronic bronchitis, a condition characterized by long-term bronchial inflammation and hypersecretion It primarily affects adults with underlying airway disease, most frequently in the context of chronic obstructive pulmonary disease (COPD) and chronic tobacco smoke or pollutant exposure

Chronic bronchitis with bacterial exacerbation is an acute, clinically significant worsening of lower respiratory tract symptoms in individuals with preexisting chronic bronchitis, a condition characterized by long-term bronchial inflammation and hypersecretion

It primarily affects adults with underlying airway disease, most frequently in the context of chronic obstructive pulmonary disease (COPD) and chronic tobacco smoke or pollutant exposure

Pathophysiologically, secondary or primary bacterial proliferation—commonly involving organisms such as *Haemophilus influenzae*, *Streptococcus pneumoniae*, or *Moraxella catarrhalis*—triggers intensified airway mucosal inflammation and impaired mucociliary clearance

Pathophysiologically, secondary or primary bacterial proliferation—commonly involving organisms such as *Haemophilus influenzae*, *Streptococcus pneumoniae*, or *Moraxella catarrhalis*—triggers intensified airway mucosal inflammation and impaired mucociliary clearance

Clinically, this episode is defined by an acute increase in dyspnea, sputum volume, and sputum purulence beyond the patient's baseline day-to-day variation

Clinically, this episode is defined by an acute increase in dyspnea, sputum volume, and sputum purulence beyond the patient's baseline day-to-day variation