Meat and poultry have long been subject to enforceable federal safeguards, but fruits and vegetables are not, although produce increasingly is being implicated in outbreaks.

• 猪肉与牛肉受强制性联邦保护措施管制，但水果和蔬菜均没有相应管制措施，而农产品正越来越多地被发现流行性爆发。