A Yellow-Pigmented Gram-Negative Rod Is Isolated from the Tracheal Aspirate

Multiple Choice

A yellow-pigmented gram-negative rod is isolated from the tracheal aspirate of a 76-year-old female. She is comatose due to meningitis and on a ventilator. The organism proved to be:
$\begin{array}{ll} \text {MacConkey agar: clear colonies}& \text {Oxidase: no color change}\\ \text {Motility: positive}& \text {TSI: \( \mathrm{K} / \mathrm{NC} \) }\end{array}$

OF medium:
Open tubes: glucose: yellow, lactose: yellow, maltose: yellow
Closed tubes: glucose: green, lactose: green, maltose: green
When assessing the organisms's clinical significance, it is probably

A) of limited pathogenicity
B) a colonizer.
C) a true nosocomial pathogen.
D) a and b.