Hen can a person with Shigella comen back to work?

If a food handler was diagnosed but had no symptoms, he/she cannot return to work until seven days have passed since the diagnosis. Approval from the food establishment's regulatory authority is required before a food handler can return to work. What can be done to prevent the spread of shigellosis?

“If a food handler was diagnosed but had no symptoms, he/she cannot return to work until seven days have passed since the diagnosis. Approval from the food establishment's regulatory authority is required before a food handler can return to work. What can be done to prevent the spread of shigellosis?”