Laboratory confirmation of infection with/without symptoms:

isolation of a Salmonella sp. from an appropriate clinical specimen

Clinical illness in a person who is epidemiologically linked to a confirmed case 

Clinical illness is characterized by diarrhea, abdominal pain, nausea, and sometimes vomiting.  Asymptomatic infections may occur, and the organism may cause extra-intestinal infections.

Note: This may include Typhie and Paratyphi.  Typhoid and Paratyphoid fever have separate definitions as well.