Pus Collected from a Draining Axillary Lymph Node Is Sent

Multiple Choice

Pus collected from a draining axillary lymph node is sent to the laboratory. A gramnegative 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

$\begin{array}{ll} \text {Motility at \( 35^{\circ} \mathrm{C} \) : negative}& \text {Urea: no color change}\\ \text {Motility at \( 25^{\circ} \mathrm{C} \) : negative}& \text {PAD: no color change}\\ \text {VP: no color change}&\text {Lysine and Ornithine: no color change}\\ \text {Indole: no color change}&\text {TSI: red slant and yellow butt}\\\end{array}$

Citrate: green
This organism is the causative agent of

A) typhoid fever.
B) gastroenteritis.
C) plague.
D) mesenteric lymph adenitis.