A 6-year-old boy whose family recently immigrated to the United States is brought to the office due to sore throat and fever. Physical examination reveals pharyngeal erythema and edema with coalescing, gray exudate. Bilateral cervical lymph nodes are enlarged and tender. A rapid streptococcal test result is negative. The toxin responsible has a mechanism of action most similar to another toxin produced by which of the following bacteria?

Question

A 6-year-old boy whose family recently immigrated to the United States is brought to the office due to sore throat and fever.   Physical examination reveals pharyngeal erythema and edema with coalescing, gray exudate.  Bilateral cervical lymph nodes are enlarged and tender.  A rapid streptococcal test result is negative.  The toxin responsible has a mechanism of action most similar to another toxin produced by which of the following bacteria?

Quizplus · Accepted Answer

Eductional Objective: Diphtheria toxin and pseudomonal exotoxin A act by ribosylating and inactivating elongation factor-2, inhibiting host cell protein synthesis and causing cell death.

A 6-Year-Old Boy Whose Family Recently Immigrated to the United