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Salmonellosis is a diarrheal illness caused by infection with Salmonella bacteria that are spread through the fecal-oral route, through contaminated food and water, and through direct and indirect contact with infected animals and their environments. Animals commonly infected with Salmonella include reptiles (such as snakes, lizards, and turtles), chickens, ducks, pigs, cows, and rodents. Pets are a common source of infection. Infected children and persons with poor hygiene can contaminate the household environment, leading to household transmission.

Persons with salmonellosis can remain infectious even after symptoms resolve and spread infection for several days to weeks and less commonly, for months or years. Salmonella outbreaks have been associated with a variety of commercially distributed food products, including produce, nuts, eggs, and poultry.

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