Nausea, vomiting, diarrhea. Not really dangerous except in weakened individuals, e.g. Patients in nursing homes. No reliable immunity. More than 2000 serovars, about 50 in the US 2. Usual incubation 12-36 hours 3.
Bacteria invade intestinal mucose and multiply.
May get into blood and lymph and affect many organs. Death rate higher in infants and old people. Antibiotics not useful. Organism may be shed in feces for months after recovery Meat, poultry, dairy products. Typhoid Fever - Salmonella typhi .