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A 19-year-old man returns from travel in South America. He presents complaining of profuse, watery diarrhea. You suspect the causative organism to be Enterotoxigenic E. coli. What is the mechanism by which this organism causes diarrhea?
Blocks the release of inhibitory neurotransmitters GABA and glycine
Blocks the presynaptic release of acetylcholine at the neuromuscular junction
Inactivates mammalian 60S ribosomal subunit
Stimulates release of cytokines
Stimulates adenylate cyclase (increasing cAMP)
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A 22-year-old woman comes to the urgent care clinic with sudden onset of severe vomiting. She had been at a picnic with her boyfriend a few hours earlier, enjoying barbecue, potato salad, and cake. Shortly thereafter, she began vomiting and has vomited 5 times in the last 3 hours. She has no prior history of symptoms. After a few hours of observation, her symptoms abate, and she is safely discharged home. Which of the following is the most likely cause of her vomiting?
Toxin ingestion from spore-forming organism
Toxin ingestion from non-spore-forming organism