Symptoms of Salmonella Infection
Symptoms of Salmonella infection include painful abdominal cramps, diarrhea and often fever.
Salmonella infections can have a broad range of illness, from no symptoms to severe illness. The most common clinical presentation is acute gastroenteritis. Symptoms include diarrhea and abdominal cramps, often accompanied by fever of 100°F to 102°F (38°C to 39°C). [4, 5] Other symptoms may include bloody diarrhea, vomiting, headache and body aches.
The incubation period, or the time from ingestion of the bacteria until the symptoms start, is generally 6 to 72 hours; however, there is evidence that in some situations the incubation can be longer than 10 days. [6, 7] People with salmonellosis usually recover without treatment within 3 to 7 days.  Nonetheless, the bacteria will continue to be present in the intestinal tract and stool for weeks after recovery of symptoms—on average, 1 month in adults and longer in children. 
S. Typhi and Paratyphi generally cause a bacteremic illness—Salmonella found in the blood—of long duration. This illness is called enteric, typhoid, or paratyphoid fever.  Symptoms start gradually, and include fever, headache, malaise, lethargy, and abdominal pain. In children, it can present as a non-specific fever. The incubation period for S. Typhi is usually 8 to 14 days, but it can range from 3 to 60 days. [5, 6] For S. Paratyphi infections, the incubation period is similar to that of non-typhoidal Salmonella, 1 to 10 days. [5,6]