So this is different than the Veroa Mite? I know that was real bad in the late 90's.
As a former beekeeper 88-97 I wonder if this is not a problem with genetic diversity, as most Beekeepers buy packages and queens every year to replace lost ones. With a limited amount of companies producing these you could see a lack of genetic diversity causing much of these problems. Much like the corn blight in the 40's. Also so many of the beekeepers are moving their hives to pollination areas in the winter transmission of any disease is much faster.