Given the Presence of Blood and White Blood Cells in Stool

Multiple Choice

Given the presence of blood and white blood cells in stool, which of the following organisms is the most likely pathogen?

A) non-motile, urea-negative, non-lactose fermenter.
B) H₂S-positive, lysine-positive, citrate-negative, non-lactose fermenter.
C) H₂S-positive, lysine-positive, citrate-positive, non-lactose fermenter.
D) PAD-positive, urea-positive non-lactose fermenter.