Animals are the major reservoir for most Salmonella.
-Poultry: fecal contamination during processing.
-Eggs: transovarial transmission in chicken
-Less frequently: dairy products, meat, fresh produce, contaminated water, pets (reptiles).
But Salmonella Typhi, and Salmonella Paratyphi A, B, C only colonize humans.
-Infection acquired through fecal contamination from individual who has enteric fever or is a chronic carrier.
Transmission by oral route from contaminated food and drink (fecal contamination).
-Thoroughly cook meat (especially poultry) and eggs.