How do eggs get contaminated with salmonella?

Eggs can become contaminated with Salmonella during the egg production process, particularly if hens carry the bacteria in their ovaries or intestines. The bacteria can be present on the eggshell or inside the egg if the hen is infected. Environmental factors, such as poor sanitation, can also contribute to contamination. Proper handling and cooking of eggs can significantly reduce the risk of salmonella infection.