Actually one of the most tragic cases of listeria involved food served by a VERY large caterer (hospitals etc - therefore you would think that would be safe), and resulted in 3 stillborn babies. What did they eat? FRUIT SALAD. Most people think that's safe too.........

I'm not being fatalistic, in fact I was completely unaware there were any foods you couldn't eat with my first preg - but you can't think ignorance is bliss, when you KNOW there are risks.