Which Gram-stain feature helps identify Fusobacterium nucleatum?

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Prepare for the Clinical Laboratory Science Bacteriology Test. Engage with multiple choice questions and flashcards with helpful hints and explanations. Ace your exam confidently!

Multiple Choice

Which Gram-stain feature helps identify Fusobacterium nucleatum?

Explanation:
Fusobacterium nucleatum shows a distinctive Gram-stain appearance: a Gram-negative, slender rod that tapers to pointed ends. This fusiform shape, along with its Gram-negative reaction, helps set it apart from organisms that appear as Gram-positive cocci in clusters, Gram-positive spore-forming rods, or Gram-negative cocci in pairs. So the key identifying feature is a Gram-negative rod with pointed ends.

Fusobacterium nucleatum shows a distinctive Gram-stain appearance: a Gram-negative, slender rod that tapers to pointed ends. This fusiform shape, along with its Gram-negative reaction, helps set it apart from organisms that appear as Gram-positive cocci in clusters, Gram-positive spore-forming rods, or Gram-negative cocci in pairs. So the key identifying feature is a Gram-negative rod with pointed ends.

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