A 26-year-old man comes to the physician for a 4-day history of foul-smelling stools and bloating. Light microscopy of a stool sample is performed. Which of the following is the mechanism of action of the most appropriate pharmacologic therapy for this patient?
DNA polymerase inhibition
RNA polymerase inhibition
30S ribosomal subunit inhibition
Dihydrofolate reductase inhibition
Toxic metabolite production
