Moraxella catarrhalis - Gram-negative cocci (subgenus Moraxella - coccobacilli) is a common isolate from respiratory specimens like sputum. It produces smooth, round, uniform, grey/brown colonies, which need to be distinguished from Neisseria species (smooth, round, moist, uniform grey/brown colony). The hockey puck sign is a quick test to help in distinguishing them.
Moraxella catarrhalis is oxidase + and tributyrin +. It has a tendency to resist decolourisation (Gram stain).
Негізгі бет Moraxella Hockey-puck sign
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