[fivecatsandadog]

Well, I think mosquitoes are the only bugs we know of that carry WNV. From the CDC website: One of the species of mosquitoes found to carry West Nile virus is the Culex species, which survives through the winter, or "overwinters," in the adult stage. That the virus survived along with the mosquitoes was documented by the widespread transmission during the summer of 2000." So, maybe a mosquito carrying WNV rode over on a plane or cargo hold. Seems pretty remote, but guess it only takes one.

[areafiftyone]

You are right it only takes one with the virus to reproduce thousands of eggs YUK!