What if cures already exist?

Mushroom extract might save bees from killer virus

Via Wired.com:

THE BEES, AS you've probably heard, are dying, in massive numbers. Termed Colony Collapse Disorder, the die-off counts among its causes a parasite aptly named Varroa destructor. A flat, button-shaped, eight-legged critter no more than 2 millimeters long, Varroa mites invade honeybee hives around the world in droves, latch onto their inhabitants, and feed on their tissues, transmitting devastating RNA viruses in the process.

The worst of these diseases is deformed wing virus, believed to be one of the largest contributors to the devastation of honeybees worldwide. Named for the shrunken and misshapen wings that develop in affected bees, DWV robs its hosts of flight, undermines their immune system, and halves their lifespan. The sicker a bee is, and the more useless its wings, the fewer plants it pollinates. What's more, what flora an infected bee does manage to visit become tainted by the virus, transmitting the infection to future pollinators. As if a bee-debilitating virus transmitted by itty bitty parasites wasn't terrifying enough, beekeepers currently possess no effective means of battling the virus.

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In both indoor experiments and outdoor field tests, bees that fed on mycelium extracts fared significantly better than those that drank only sugar water. In caged bees infected with DWV, the researchers observed an 800-fold decrease in virus titres (a measure of the level of virus in the bee's system) among bees dosed with amadou extract. The effect was less powerful in the field, which are less strictly controlled than lab trials—colonies fed reishi extract saw a 79-fold reduction in DWV, those fed amadou extract a 44-fold reduction—but the results were still highly significant. (In other field tests, bees fed reishi extract saw a remarkable 45,000-fold reduction in Lake Sinai virus—another disease ravaging honeybee populations.)

"It's shown a strong effect, stronger than anything I've seen," says geneticist Jay Evans, head of the USDA's Bee Research Laboratory, which analyzed the virus levels. Stronger, even, than RNA interference, another promising—but expensive—approach to fighting bee viruses that Evans himself is investigating. "I'm a little jealous," he says.

https://www.wired.com/story/a-mushroom-extract-might-save-bees-from-a-killer-virus/