Which of the following is a small Gram-negative rod requiring X-factor for growth?

Name: Which of the following is a small Gram-negative rod requiring X-factor for growth?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Haemophilus ducreyi is a small Gram-negative rod that belongs to the family Pasteurellaceae and requires X-factor (hemin) for growth. Escherichia coli, Treponema pallidum, and Neisseria gonorrheae are all Gram-negative bacteria but do not require X-factor for growth.

Which of the Following Is a Small Gram-Negative Rod Requiring