well, i guess if one was foamin at the mouth and actin like ol yeller did, i would prolly leave em lie..but never had a problem so far. you have to cook it through anyways...now deer on the other hand, which i prepare wayyy rare..could be an issue. beef too...
there are also a few diseases hogs and deer can carry that will get ya sick as well...
as for me, proper storage and cooking procedures have kept us safe.