Acute exacerbation of obstructive chronic bronchitis by M. catarrhalis

An acute exacerbation of obstructive chronic bronchitis by *Moraxella catarrhalis* is a sudden, sustained worsening of lower respiratory tract symptoms in adults with underlying chronic obstructive pulmonary disease characterized by chronic bronchitis

An acute exacerbation of obstructive chronic bronchitis by *Moraxella catarrhalis* is a sudden, sustained worsening of lower respiratory tract symptoms in adults with underlying chronic obstructive pulmonary disease characterized by chronic bronchitis Clinically, affected patients experience acute increases in baseline dyspnea, heightened cough severity, and increased sputum volume and purulence beyond normal day-to-day variations

An acute exacerbation of obstructive chronic bronchitis by *Moraxella catarrhalis* is a sudden, sustained worsening of lower respiratory tract symptoms in adults with underlying chronic obstructive pulmonary disease characterized by chronic bronchitis The condition arises when mucosal infection or overgrowth by the Gram-negative diplococcus *M. catarrhalis* provokes acute neutrophilic inflammation within previously compromised, obstructed airways Clinically, affected patients experience acute in...

The condition arises when mucosal infection or overgrowth by the Gram-negative diplococcus *M. catarrhalis* provokes acute neutrophilic inflammation within previously compromised, obstructed airways

Pathophysiologically, this infectious insult impairs mucociliary clearance and accelerates bronchial wall swelling, leading to increased airway resistance and dynamic hyperinflation

Pathophysiologically, this infectious insult impairs mucociliary clearance and accelerates bronchial wall swelling, leading to increased airway resistance and dynamic hyperinflation

Clinically, affected patients experience acute increases in baseline dyspnea, heightened cough severity, and increased sputum volume and purulence beyond normal day-to-day variations