Deformed wing virus prevalence and load in honeybees in South Africa

de Souza, FS, Allsopp, MH and Martin, SJ ORCID: 2021, 'Deformed wing virus prevalence and load in honeybees in South Africa' , Archives of Virology, 166 , pp. 237-241.

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Deformed wing virus (DWV) is an emerging honeybee pathogen that has appeared across the globe in the past 40 years. When transmitted by the parasitic varroa mite, it has been associated with the collapse of millions of colonies throughout the Northern Hemisphere. However, despite the presence of the mite in the Southern Hemisphere, infested colonies survive. This study investigated the prevalence of DWV genotypes A, B and C along with their viral loads in South Africa and compared the fndings with recent data from Brazil, the UK and the USA. We found that DWV-B was the most prevalent genotype throughout South Africa, although the total DWV viral load was signifcantly lower (2.8E+07) than found in the Northern Hemisphere (2.8E+07 vs. 2.7E+10, p > 0.00001) and not signifcantly diferent to that found in Brazil (5E+06, p = 0.13). The diferences in viral load can be explained by the mite resistance in Brazil and South Africa, since mite-infested cells containing high viral loads are removed by the bees, thus lowering the colony’s viral burden. This behaviour is much less developed in the vast majority of honeybees in the Northern Hemisphere.

Item Type: Article
Schools: Schools > School of Environment and Life Sciences
Journal or Publication Title: Archives of Virology
Publisher: Springer
ISSN: 0304-8608
Related URLs:
Funders: Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Depositing User: USIR Admin
Date Deposited: 05 Nov 2020 10:39
Last Modified: 16 Feb 2022 05:55

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