when I asked my OB about salads. I was like, "so, should I also avoid salads or salads with meats on top, like grilled chicken? Or chicken salad?" All those are apparently OK. I find this confusing. I conclude that grilled chicken is hand cut and not cut on those big machines - ?? - but actually I don't know if that's the reason. I didn't probe further out of fear of having more stuff cut from my potential menu!!
It may be worthwhile to note that Listeria is very rare. Some OBs seem to allow deli as long as it's from a "nice" place. Go figure on which places are "nice" but I have read to avoid chains like Subway (where stuff is probably actually sitting around less because they're busy. Who knows!).
Signed, Episodes from the Crazy Knocked-Up Manual