Rat lungworm has a ground zero, Puna.

[Kenney]

Giant African Slugs came here via Japan to be used as garden ornaments and food in 1935 .(in mail and luggage). They were secretly cultivated . By the time "officials " found out, it was too late. Semi slugs appeared more recently. Both carry RLW to my knowledge.
I have lots of "garden ornaments" in my yard. My dogs think the shells are toys.
Last night's tv news said dogs can get RLW. as well as Parrots and horses.
Nobody knows where this will end until some funding and lots more research is done.