Pus collected from a draining axillary lymph node is sent to the laboratory. A gram-negative rod is observed on Gram stain
Twenty-four hours after incubation at 35°C in CO2, a poorly growing non-lactose fermenter is observed. After 48 hours, the colonies on BAP and MAC were slightly larger. The organism proved to be
Motility at 35°C: negative Urea: no color change
Motility at 25°C: negative PAD: no color change
VP: no color change Lysine and Ornithine: no color change
Indole: no color change TSI: red clant and yellow butt
Citrate: green
This organism is the causative agent of
A) typhoid fever. B) mesenteric lymph adenitis.
C) gastroenteritis. D) plague.
D
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