Deformed wing virus (DWV) has been linked to the global decline of honey bees. DWV exists as three master variants (DWV-A, DWV-B, and DWV-C), each with differing outcomes for the honey bee host. Research in the USA showed a shift from DWV-A to DWV-B between 2010 to 2016 in honey bee colonies. Likewise, in the UK, a small study in 2007 found only DWV-A, whereas in 2016, DWV-B was the most prevalent variant. This suggests a shift from DWV-A to DWV-B might have occurred in the UK between 2007 and 2016. To investigate this further, data from samples collected in 2009/10 (n = 46) were compared to existing data from 2016 (n = 42). These samples also allowed a comparison of DWV variants between Varroa-untreated (feral) and Varroa-treated (managed) colonies. The results revealed that, in the UK, DWV-A was far more prevalent in 2009/10 (87%) than in 2016 (43%). In contrast, DWV-B was less prevalent in 2009/10 (76%) than in 2016 (93%). Regardless if colonies had been treated for Varroa (managed) or not (feral), the same trend from DWV-A to DWV-B occurred. Overall, the results reveal a decrease in DWV-A and an increase in DWV-B in UK colonies.

变形翅病毒 (DWV) 与全球蜜蜂数量减少有关。DWV 存在三个主要变体（DWV-A、DWV-B 和 DWV-C），每个变体对蜜蜂宿主都有不同的结果。美国的研究表明，在 2010 年至 2016 年间，蜜蜂群落从 DWV-A 转变为 DWV-B。同样，在英国，2007 年的一项小型研究仅发现 DWV-A，而在 2016 年，DWV-B 是最普遍的变体。这表明 2007 年至 2016 年间英国可能发生了从 DWV-A 到 DWV-B 的转变。为了进一步研究这一点，将 2009/10 年收集的样本数据（n = 46）与 2016 年的现有数据（n = 42)。这些样本还允许比较未经处理（野生）和 Varroa之间的DWV变体-处理（管理）的菌落。结果显示，在英国，DWV-A 在 2009/10 年 (87%) 比 2016 年 (43%) 更为普遍。相比之下，DWV-B 在 2009/10 年 (76%) 的流行率低于 2016 年 (93%)。无论菌落是否接受过Varroa（管理）或未治疗（野生），从 DWV-A 到 DWV-B 的趋势相同。总体而言，结果显示英国殖民地的 DWV-A 减少和 DWV-B 增加。