Yes, and I had listeria from the brie while pregnant! Yes, stupid me eating soft cheese. It was a real brain fart while traveling. I was about 12 weeks at the time, was mildly sick for about 3 days and my baby was born perfectly healthy. So, even though it anecdotal, even on the very slim chance you develop listeria it is also then a very slim chance that your baby will be affected. If it's really worrying you I would go ahead with the testing and that will help you put it behind you, or tackle any possible complications.