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A Microbiologist Examines Culture Plates with Large Nonpigmented Gray Colonies

Question 22

Multiple Choice

A microbiologist examines culture plates with large nonpigmented gray colonies at 24 hours that are indole-negative, nonmotile, catalase-positive, and resistant to polymyxin B disks. The Gram stain shows this is a gram-negative coccobacillus. What is the most probable organism?


A) Francisella tularensis
B) Brucella mallei
C) Yersinia pestis
D) Burkholderia cepacia

Correct Answer:

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