It is not advised you eat these purchased whilst pregnant. As Cailin said they can and do harbour listeria. In fact rice is a high risk food if it has been pre prepared and refrigerated. Which it is very often in preparation of these yummy rolls.

If you make them at home and eat them fresh it's fine. But don't make them at home and refrigerate and eat the next day.

If you go to the australia nz food standards web site it clearly lists this as a food issue in pregnancy.