I have been paranoid too about getting listeria as when I was 5 wks I ate a cheese board with soft cheeses etc on it, I have also had ice creams from maccas and salami on pizzas, and atm becasue I am so lazy (haha) I have been getting those pre-packed mixed fresh salads from the supermarket so that I dont have to cut up salads etc ..which has been concerning me...BUT there are sooooooooooo many things that you could get listeria from...just eat in moderation n you will be fine I read a thing today saying that listeria is actually really uncommon it affect like 1:20000 people or something.