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Varroa mites, the most important parasite of bees, can also affect wild bees. As reported by the University of Ulm, scientists from Exeter, Berkley and Ulma investigated the spread of ambrosial (DWV) virus in areas with and without mite infection.
It was found that pathogens in the areas with the appearance of Varroa mites were the most widespread and that there were significantly higher rates of infection. In addition, it has been shown that in these areas DWV is also more widespread among wild bees
"Honey and wild bees share common habitats and use the same plants," said Robyn Manley of the University of Exeter. Mites can only transmit the virus within one host. To jump to other hosts the virus chooses the direct mode. From the evolutionary and infectious ecological points of view, this is an exciting process that can show how infectious diseases open new pathways to their spread, the hard researcher.
According to her, the results show that wild bees also benefit from the struggle against Varroe. Therefore it is of great environmental importance to preserve colonies of honeysuckle bees free of mites. DWV infects bees, especially in the stage of larvae or puppies. In "adult" bees, the disease is primarily due to wing deformation and abdominal shortening can be seen.
According to the University of Ulm, many infected larvae are not sustainable and die after they are shedding. Infected bee communities failed to survive the winter. For the beekeepers concerned and the economic damages are enormous.