Results 1 to 4 of 4
  1. #1
    Join Date
    Jan 2010
    Location
    Alachua County, FL, USA
    Posts
    6,878

    Default Increased Tolerance and Resistance to Virus Infections: A Possible Factor

    Increased Tolerance and Resistance to Virus Infections: A Possible Factor in the Survival of Varroa destructor-Resistant Honey Bees (Apis mellifera)
    The honey bee ectoparasitic mite, Varroa destructor, has a world-wide distribution and inflicts more damage than all other known apicultural diseases. However, Varroa-induced colony mortality is more accurately a result of secondary virus infections vectored by the mite. This means that honey bee resistance to Varroa may include resistance or tolerance to virus infections. The aim of this study was to see if this is the case for a unique population of mite-resistant (MR) European honey bees on the island of Gotland, Sweden. This population has survived uncontrolled mite infestation for over a decade, developing specific mite-related resistance traits to do so. Using RT-qPCR techniques, we monitored late season virus infections, Varroa mite infestation and honey bee colony population dynamics in the Gotland MR population and compared this to mite-susceptible (MS) colonies in a close by apiary. From summer to autumn the deformed wing virus (DWV) titres increased similarly between the MR and MS populations, while the black queen cell virus (BQCV) and sacbrood virus (SBV) titres decreased substantially in the MR population compared to the MS population by several orders of magnitude. The MR colonies all survived the following winter with high mite infestation, high DWV infection, small colony size and low proportions of autumn brood, while the MS colonies all perished. Possible explanations for these changes in virus titres and their relevance to Varroa resistance and colony winter survival are discussed.
    http://www.plosone.org/article/info%...l.pone.0099998
    americasbeekeeper.com
    beekeeper@americasbeekeeper.com

  2. #2
    Join Date
    Jul 2013
    Location
    Morro Bay, California, USA
    Posts
    795

    Default Re: Increased Tolerance and Resistance to Virus Infections: A Possible Factor

    Thanks for posting. This is a fascinating and important paper. Folks should download and read the full document.

  3. #3
    Join Date
    May 2014
    Location
    Washington County, Pa
    Posts
    40

    Default Re: Increased Tolerance and Resistance to Virus Infections: A Possible Factor

    This was very good. There were things I feel were not touched upon, such as how the (MR) hives were acquired, whether from a private breeder, or feral stock.
    If Feral stock, were they allowed to make their own comb or put on foundation, as cell size may or may not have made a difference in its case as feral stock would have regressed over a decade to an optimal size(s).

  4. #4

    Default Re: Increased Tolerance and Resistance to Virus Infections: A Possible Factor

    It has been clear for a long time that virus tolerance and resistance are one central part of varroa resistance.
    Treatment free, honey production, isolation mated queens, www.saunalahti.fi/lunden/varroakertomus.html

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Ads