Final answer:
Foodborne botulism occurs when adults and children ingest preformed toxin produced by Clostridium botulinum. Symptoms include blurred vision, drooping eyelids, difficulty swallowing, abdominal cramps, nausea, vomiting, constipation, or possibly diarrhea.
Step-by-step explanation:
When adults and children ingest preformed toxin produced by Clostridium botulinum, foodborne botulism results. This occurs when BONT (botulinum neurotoxin) is produced in contaminated food and then ingested. Early symptoms of botulism include blurred vision, drooping eyelids, difficulty swallowing, abdominal cramps, nausea, vomiting, constipation, or possibly diarrhea.