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Persistence of subclinical deformed wing virus infections in honeybees following Varroa mite removal and a bee population turnover

Locke, Barbara and Semberg, Emilia and Forsgren, Eva and Rodrigues De Miranda, Joachim (2017). Persistence of subclinical deformed wing virus infections in honeybees following Varroa mite removal and a bee population turnover. PloS one. 12:7, e0180910
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Official URL: http://dx.doi.org/10.1371/journal.pone.0180910

Abstract

Deformed wing virus (DWV) is a lethal virus of honeybees (Apis mellifera) implicated in elevated colony mortality rates worldwide and facilitated through vector transmission by the ectoparasitic mite Varroa destructor. Clinical, symptomatic DWV infections are almost exclusively associated with high virus titres during pupal development, usually acquired through feeding by Varroa mites when reproducing on bee pupae. Control of the mite population, generally through acaricide treatment, is essential for breaking the DWV epidemic and minimizing colony losses. In this study, we evaluated the effectiveness of remedial mite control on clearing DWV from a colony. DWV titres in adult bees and pupae were monitored at 2 week intervals through summer and autumn in acaricide-treated and untreated colonies. The DWV titres in Apistan treated colonies was reduced 1000-fold relative to untreated colonies, which coincided with both the removal of mites and also a turnover of the bee population in the colony. This adult bee population turnover is probably more critical than previously realized for effective clearing of DWV infections. After this initial reduction, subclinical DWV titres persisted and even increased again gradually during autumn, demonstrating that alternative non-Varroa transmission routes can maintain the DWV titres at significant subclinical levels even after mite removal. The implications of these results for practical recommendations to mitigate deleterious subclinical DWV infections and improving honeybee health management are discussed.

Authors/Creators:Locke, Barbara and Semberg, Emilia and Forsgren, Eva and Rodrigues De Miranda, Joachim
Title:Persistence of subclinical deformed wing virus infections in honeybees following Varroa mite removal and a bee population turnover
Series/Journal:PloS one (1932-6203)
Year of publishing :2017
Volume:12
Number:7
Page range:e0180910
Number of Pages:10
Publisher:Public Library of Science
ISSN:1932-6203
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:X Agricola extesions > X30 Life sciences
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Zoology
Agrovoc terms:viroses, Apis mellifera, Varroa, infection
Keywords:viroses, Apis mellifera, varroa, infection
URN:NBN:urn:nbn:se:slu:epsilon-e-4520
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-4520
Additional ID:
Type of IDID
Web of Science (WoS)000405464100121
ID Code:14786
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:01 Dec 2017 09:05
Metadata Last Modified:04 Dec 2017 08:45

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