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Subject:
From:
Peter Loring Borst <[log in to unmask]>
Reply To:
Informed Discussion of Beekeeping Issues and Bee Biology <[log in to unmask]>
Date:
Sun, 15 Sep 2013 12:06:57 +0000
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> Here we investigate the prevalence of N. ceranae in wild bumblebees in the UK and determine the infectivity of the parasite under controlled conditions.
> 
> The results show conclusively that N. ceranae from honeybees is capable of infecting bumblebees and is already circulating in wild populations. Between 20–47% of wild-caught bumblebees at three out of the five sites we sampled in the UK were positive for N. ceranae, and in many cases these bees had N. ceranae spores in their guts. Furthermore, the presence of N. ceranae was not restricted to the common B. terrestris bumblebee but was found in a total of 7 different species (all the species tested).
> 
> The results demonstrate that the spillover of N. ceranae from honeybees to bumblebees is occurring, and that its high virulence in bumblebees means that it poses a significant risk to them. In addition to our own findings of N. ceranae in wild bumblebee pop- ulations in the UK, field surveys using genetic methods suggest that these infections are also taking place in Argentina and China 

Emerging dangers: Deadly effects of an emergent parasite in a new pollinator host
Journal of Invertebrate Pathology Volume 114, Issue 2, October 2013, Pages 114–119
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