Final answer:
Moraxella catarrhalis is a facultative anaerobic bacterium that is encapsulated and nonmotile. It can cause respiratory infections, particularly pneumonia in individuals with alcoholism.
Step-by-step explanation:
Moraxella catarrhalis is a facultative anaerobe, encapsulated, nonmotile bacterium. It may appear as a coccobacillus, aerobe, or facultative anaerobe, and is capable of growing on blood agar. Pathogenic species of Moraxella catarrhalis can cause respiratory infections such as pneumonia, especially in individuals with alcoholism.