Final answer:
Among the listed terms, 'Disphagia' is misspelled and should be spelled as 'dysphagia', with the correct spelling denoting difficulty in swallowing. The correct option is E.
Step-by-step explanation:
The misspelled term among the options provided is E. Disphagia. The correct spelling of this term is dysphagia, which refers to difficulty in swallowing. The remaining terms Salmonella, Repression, Peristalsis, and Vomiting are spelled correctly.
For clarification, Salmonella is a type of bacteria; Repression is a psychological concept; Peristalsis is a series of muscle contractions that moves food through the digestive tract; and Vomiting is the forceful expulsion of stomach contents through the mouth.