Kevin Gross wrote:

"He also was reporting that poor queens and drone layers appear to have 
around 50% of their sperm sterile."

Could it be a sexually transmitted virus?  There is a project in the UK 
to look at the spermathecae of failing queen compared to productive 
ones; the (as yet unproven afaik) thought is that viruses might weaken 
or disrupt the membraneous wall of the organ.  Might be a less obvious 
symptom of DWV or something else.

Chris

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