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A Microbiologist Is Examining Plates of a Lymph Node Biopsy

Question 15

Multiple Choice

A microbiologist is examining plates of a lymph node biopsy from a seriously ill patient. The SBA plate shows small, nonhemolytic colonies that have a fried egg appearance. On MacConkey agar, these organisms grow as a small, nonlactose fermenter. On Gram stain, this organism exhibits bipolar staining and plump gram-negative rods. What is the most probable identification?


A) Brucella mallei
B) Bacillus anthracis
C) Yersinia pestis
D) Burkholderia cepacia

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