Is Neisseria gonorrhoeae Gram negative or Gram positive bacteria?

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Study for the NBEO Ocular Disease Part 1 Test. Use flashcards and multiple choice questions, each with hints and explanations, to prepare for your exam! Get ready for your success!

Multiple Choice

Is Neisseria gonorrhoeae Gram negative or Gram positive bacteria?

Explanation:
Neisseria gonorrhoeae is a Gram-negative bacterium, reflected by its cell wall structure: a thin peptidoglycan layer and an outer membrane with lipooligosaccharide. When subjected to Gram staining, it does not retain the crystal violet-iodine complex after alcohol decolorization, so it takes up the counterstain and appears pink/red. This is why it is classified as Gram-negative. In practice, you’ll see Neisseria gonorrhoeae as Gram-negative diplococci, often inside neutrophils, which aligns with its staining and morphological features. The other options would imply Gram-positive characteristics, no staining, or variable staining, none of which fit this organism.

Neisseria gonorrhoeae is a Gram-negative bacterium, reflected by its cell wall structure: a thin peptidoglycan layer and an outer membrane with lipooligosaccharide. When subjected to Gram staining, it does not retain the crystal violet-iodine complex after alcohol decolorization, so it takes up the counterstain and appears pink/red. This is why it is classified as Gram-negative. In practice, you’ll see Neisseria gonorrhoeae as Gram-negative diplococci, often inside neutrophils, which aligns with its staining and morphological features. The other options would imply Gram-positive characteristics, no staining, or variable staining, none of which fit this organism.

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