 In some cases, though, the diarrhea may be so severe that the patient becomes dangerously dehydrated and must be hospitalized.At the hospital, the patient may receive fluids intravenously to treat the dehydration, and may be given medications to provide symptomatic relief, such as fever reduction.In severe cases, the "Salmonella" infection may spread from the intestines to the blood stream, and then to other body sites, and can cause death, unless the person is treated promptly with antibiotics.