What is a common clinical finding in patients with infections from Moraxella catarrhalis?

Moraxella catarrhalis is primarily associated with respiratory tract infections. It is a common pathogen seen in cases of otitis media (middle ear infections), sinusitis, and exacerbations of chronic obstructive pulmonary disease (COPD). This organism typically colonizes the upper respiratory tract and can cause illness, particularly in children and individuals with underlying respiratory conditions.

The presence of Moraxella catarrhalis in respiratory infections is notable because it can lead to symptoms such as cough, phlegm production, and difficulty breathing, as well as more systemic symptoms like fever. This organism has also been recognized for its increasing resistance to antibiotics, further complicating treatment.

The remaining options describe conditions that are not typical for infections caused by Moraxella catarrhalis, thus solidifying respiratory tract infections as the most relevant clinical finding associated with this bacterium.