incubation period salmonella
1 The incubation period of Salmonella gastroenteritis is 6-72 hours. 2  In most cases, children have cramping abdominal pain, nausea, vomiting, and loose watery stools.3  Stools may be bloody; however, this is not as common as in infection with Shigella.nteric fever (typhoid fever). 1  Enteric fever is caused by S. typhi and several other Salmonella serotypes. 2  The incubation period for enteric fever is 3-60 days, but symptoms typically occur in 1-2 weeks. 3  Patients may present with high fever, which rises in a steplike fashion.