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Subject:	Re: Low virulence DWV excludes colony killing strains
From:	Jose Villa <[log in to unmask]>
Reply To:	Informed Discussion of Beekeeping Issues and Bee Biology <[log in to unmask]>
Date:	Sun, 1 Nov 2015 06:25:32 -0600
Content-Type:	text/plain
Parts/Attachments:	text/plain (15 lines)

Competitive displacement may work (and actually may be occurring  
naturally) in situations with no varroa mites.  It may explain why a  
number of viruses are detectable, but usually at very low titres in  
varroa free colonies or populations of colonies.  The attached paper  
suggests that once varroa is present, the viral dynamics change  
considerably towards favoring highly replicating (virulent) variants  
of the virus (at least for DWV).

http://journals.plos.org/plospathogens/article?id=10.1371/journal.ppat.1004230

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