Consider a gram-negative human pathogen isolated from marine mammals. This pathogen is subjected to a series of tests and found to have the following characteristics: oxidase-positive; does not hydrolyze urea; produces indole; does not produce acetoin. Which of the following could it be?
a. Pasteurella multocida
b. Mannheimia haemolytica
c. Klebsiella pneumoniae
d. Yersinia enterocolitica
Answer: a. Pasteurella multocida
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Fill in the blank(s) with correct word