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Hotdogs have been recalled due to listeria before and do pose a risk if not throughly cooked, particularly to pregnant women:

http://www.ehso.com/ehshome/FoodSafety/foodslisterisosis.php

American Pregnancy also say to be wary of hotdogs:

http://www.americanpregnancy.org/pregnancycomplications/listeria.html

So I think it's correct to have it in this article.

Joanna.