That's true, I have worked around some Yemenis, where stuff like what's in me is endemic.  But I've had this way before I was around them.  My blood type plays a role too, it's B, rare here in the US, but there are much higher levels of the type found where it is endemic.  Still, these things have been here all along.  It's not as though it's a newly arrived to the US worm, just newly discovered, and if the european deer are any indication, we've not found all one might get from US deer yet.  Also worth noting is that these things infect dogs, therefore coyotes may be possible hosts too.  You know, those hairless things sometimes seen.  They were doing a pretty good job of stripping the hair off mom's dog before he fell dead.  Just up to the lump I described, still full haired above.