I think so. Requeening with an unrelated queen often fixes it.
As well as opening up the floor.
Good luck with them.
My observations with CBPV are small sample sizes and not to be taken for anything more.
Several years ago, I switched to bees imported into the US by USDA from the Primorski region of Russia 20+ years ago.
I originally thought both the black shiny bees and the other common color variant of CBPV (black butt, single stripe) were distinct bee varieties. We live in a forested area that is generally isolated.
At an open-feeder, I observed the black shiny type coming from a tree around .75km from our main yard, while the striped were coming from a state park and I never took the time to locate them.
When I started seeing these colorations in my hives at first I was excited, thinking perhaps feral bees which had survived many years were breeding into our bees. I actually argued that the black ones were A.m.m. But after several years I recanted, as there were numerous examples of CBPV online with the characteristic colors.
This spring I had one colony which troubled me, as 1/2 of the bees in a 6 over 6 frame nuc had the colors. When natural pollens came out, it cleared up a great deal. At this point I’ve probably seen several 100K bees with the virus at close range. I have yet to see a single bee trembling or disoriented.
I think the Russian bees (which were EU bees 100 years ago) are akin to Carnies and other dark bees, with cold weather adaptations (small winter clusters, 2-3 month broodless periods in winter, working cooler temps, etc.). I’m reasonably sure the CBPV affects their individual lifespans, but thus far they haven’t succumbed to it, or shown the behavioral manifestations I’ve see in some UK videos.
The virus has spread across the US (like everything else), but among the 40-50 beeks I talk with in an average season (not counting forums) no one has mentioned the trembling.
Decades ago I remember working at my dad’s sawmill. He had an engine which ran a large wood planer. Now and again the ignition points would get pitted or otherwise lose the configuration. The planer/engine would run flawlessly until I started planing a board, then it would sputter and choke like a different machine altogether. He said, “Flaws in a system will always show up under load.” Our success with bees which obviously have CBPV might possibly be fresh, varied pollen available almost continuously from late March until October. Perhaps there’s a nutritional component, and our bees are never “under load”.
Hope this helps.
