There are four items that require an internal cooking temperature of 165 F: poultry, stuffings containing poultry, casseroles containing poultry, and leftovers containing poultry. Poultry is defined as any domesticated fowl, such as chickens, turkeys, ducks, and geese. Stuffings containing poultry must also be cooked to an internal temperature of 165 F, and casseroles containing poultry should be cooked to an internal temperature of 165 F as well. Leftovers containing poultry should also be heated to an internal temperature of 165 F before consumption.