Article Correctness Is Author's Responsibility: Side-effect after antibiotics: Bacterial toxins can be made in the gut

You get an infection, you are given penicillin -- and then you could get hemorrhagic diarrhea. This rare but extremely unpleasant side reaction can be related to the enterotoxin tilivalline produced by a regular intestinal bacterium. Scientists have now scrutinized the toxin's biosynthetic pathway.