Over the three years, DWV-B abundance remained stable, whereas DWV-A showed a decreasing trend, reaching a mean value of 2.88 × 10 8 ± 6.17 × 10 9 in the third year.
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Opposite seasonal and spatial dynamics of DWV-A and DWV-B suggest distinct transmission pathways in managed honey bees (Apis mellifera L.) colonies.
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