Scholarlink

<p>Deformed wing virus (DWV) is a major viral pathogen of <i>Apis mellifera</i>, existing mainly as two genotypes, DWV-A and DWV-B, which differ in transmission dynamics and virulence. This study presents a three-year national molecular surveillance (2021–2023) of Italian honey bee colonies to investigate the spatio-temporal distribution of both variants in relation to apiary density, geographical gradients, and land-use patterns. Quantitative PCR (qPCR) and Bayesian spatio-temporal models were applied to assess viral prevalence and environmental predictors. DWV-B was the dominant variant (overall 73.7%) and displayed a marked autumnal peak in November, followed by a winter decline. In contrast, DWV-A showed a complementary trend, peaking in summer and decreasing with apiary density, suggesting an environmentally mediated transmission pathway. Spatial analysis revealed higher DWV-B prevalence in southern and insular regions, whereas DWV-A predominated in central and northeastern regions. Land-use effects further indicated that DWV-B is linked to anthropogenic landscapes with intensive beekeeping, while DWV-A is associated with more heterogeneous environments. These findings highlight distinct ecological dependencies between DWV variants: DWV-B is probably more <i>Varroa</i>-associated, colony-driven virus favoured by warm, stable climates, while DWV-A reflects diffuse environmental persistence. Integrating climatic and management factors is essential to predict DWV epidemiological shifts under global change.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Opposite seasonal and spatial dynamics of DWV-A and DWV-B suggest distinct transmission pathways in managed honey bees (Apis mellifera L.) colonies

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月8日

查看全文
  • Rossella Tiritelli,
  • Allegra Sartore,
  • Laura Zavatta,
  • Sergio Albertazzi,
  • Vittorio Capano,
  • Valeria Caringi,
  • Irene Guerra,
  • Elena Tafi,
  • Laura Bortolotti,
  • Dolores Catelan,
  • Antonio Nanetti,
  • Giovanni Cilia

摘要

Deformed wing virus (DWV) is a major viral pathogen of Apis mellifera, existing mainly as two genotypes, DWV-A and DWV-B, which differ in transmission dynamics and virulence. This study presents a three-year national molecular surveillance (2021–2023) of Italian honey bee colonies to investigate the spatio-temporal distribution of both variants in relation to apiary density, geographical gradients, and land-use patterns. Quantitative PCR (qPCR) and Bayesian spatio-temporal models were applied to assess viral prevalence and environmental predictors. DWV-B was the dominant variant (overall 73.7%) and displayed a marked autumnal peak in November, followed by a winter decline. In contrast, DWV-A showed a complementary trend, peaking in summer and decreasing with apiary density, suggesting an environmentally mediated transmission pathway. Spatial analysis revealed higher DWV-B prevalence in southern and insular regions, whereas DWV-A predominated in central and northeastern regions. Land-use effects further indicated that DWV-B is linked to anthropogenic landscapes with intensive beekeeping, while DWV-A is associated with more heterogeneous environments. These findings highlight distinct ecological dependencies between DWV variants: DWV-B is probably more Varroa-associated, colony-driven virus favoured by warm, stable climates, while DWV-A reflects diffuse environmental persistence. Integrating climatic and management factors is essential to predict DWV epidemiological shifts under global change.