I saw a report on TV done recently Australia wide on sushi (hand rolls) places and 4/5 places tested were contaminated with listeria, my doc told me of all the things to avoid in pregnancy hand rolls are the 1st, that rice you haven't cooked yourself, is the number one cause of food poisoning, ppl don't realise that when they get food posioning from thai or chinese etc that it's usually the rice that causes it because alot of places cook it the night before and refrigerate it. Listeria can grow in fridge temps.