Audio Qbank – Q248 – A 3F with bloody stool

 

A 3-year-old girl is brought to emergency by her mother for a one-day history of bloody stool and right-lower quadrant abdominal pain. She attends a daycare center. A gram-stain of a stool specimen is shown.

The organism responsible for this patient’s condition produces a toxin with which of the following cellular effects?

Activation of adenylyl cyclase
Activation of guanylyl cyclase
Cleavage of SNARE protein
Inactivation of 60s ribosomal subunit
Inhibition of elongation factor 2