Data from: Global honey bee viral landscape altered by a parasitic mite

Emerging diseases are among the greatest threats to honey bees.
Unfortunately, where and when an emerging disease will appear are almost
impossible to predict. The arrival of the parasitic Varroa mite into the
Hawaiian honey bee population allowed us to investigate changes in the
prevalence, load, and strain diversity of honey bee viruses. The mite
increased the prevalence of a single viral species, deformed wing virus
(DWV), from ~10 to 100% within honey bee populations, which was
accompanied by a millionfold increase in viral titer and a massive
reduction in DWV diversity, leading to the predominance of a single DWV
strain. Therefore, the global spread of Varroa has selected DWV variants
that have emerged to allow it to become one of the most widely distributed
and contagious insect viruses on the planet.