It's a bigger deal for transplant patients, young children, old people etc.
My girlfriend got typhoid, which is a type of salmonella, recently while working in a health clinic doing campaigns in rural peru(she even had the pills you take to help prevent it) and because she was a healthy 23 year old she just took some kind of serious antibiotics by pill for 7 days, she was pretty much feeling all better by the 2nd day except for the drug's side effects.
However if she was some 90 year old lady, she likely would have been hospitalized with a very real risk of dying.