Moraxella catarrhalis bronchitis

*Moraxella catarrhalis* bronchitis is a lower respiratory tract infection characterized by acute inflammation of the bronchial mucosa caused by the Gram-negative diplococcus *Moraxella catarrhalis* While acute tracheobronchitis can develop in immunocompromised hosts, this infection predominantly manifests as an acute bacterial exacerbation of chronic bronchitis in older adults and individuals with pre-existing chronic obstructive pulmonary disease (COPD) or compromised mucociliary clearance

*Moraxella catarrhalis* bronchitis is a lower respiratory tract infection characterized by acute inflammation of the bronchial mucosa caused by the Gram-negative diplococcus *Moraxella catarrhalis* Pathophysiologically, colonization and mucosal invasion trigger neutrophil-mediated airway inflammation, clinically presenting with increased dyspnea, worsening cough, and a marked increase in sputum volume and purulence

While acute tracheobronchitis can develop in immunocompromised hosts, this infection predominantly manifests as an acute bacterial exacerbation of chronic bronchitis in older adults and individuals with pre-existing chronic obstructive pulmonary disease (COPD) or compromised mucociliary clearance

While acute tracheobronchitis can develop in immunocompromised hosts, this infection predominantly manifests as an acute bacterial exacerbation of chronic bronchitis in older adults and individuals with pre-existing chronic obstructive pulmonary disease (COPD) or compromised mucociliary clearance

Pathophysiologically, colonization and mucosal invasion trigger neutrophil-mediated airway inflammation, clinically presenting with increased dyspnea, worsening cough, and a marked increase in sputum volume and purulence

Pathophysiologically, colonization and mucosal invasion trigger neutrophil-mediated airway inflammation, clinically presenting with increased dyspnea, worsening cough, and a marked increase in sputum volume and purulence