Deformed wing virus (DWV) is a major pathogen of concern to apiculture, and recent reports have indicated the local predominance and potential virulence of recombinants between DWV and a related virus, Varroa destructor virus 1 (VDV). However, little is known about the frequency and titer of VDV and recombinants relative to DWV generally. In this study, I assessed the relative occurrence and titer of DWV and VDV in public RNA-seq accessions of honey bee using a rapid, kmer-based approach. Three recombinant types were detectable graphically and corroborated by de novo assembly. Recombination breakpoints did not disrupt the capsid-encoding region, consistent with previous reports, and both VDV- and DWV-derived capsids were observed in recombinant backgrounds. High abundance of VDV kmers was largely restricted to recombinant forms. Non-metric multidimensional scaling identified genotypic clusters among DWV isolates, which was corroborated by read mapping and consensus generation. The recently described DWV-C lineage was not detected in the searched accessions. The data further highlight the utility of high-throughput sequencing to monitor viral polymorphisms and statistically test biological predictors of titer, and point to the need for consistent methodologies and sampling schemes.

,The presence and replication of honeybee deformed wing virus variant A (DWV-A) was recently confirmed in the red imported fire ants, Solenopsis invicta Buren. Reported here is the complete genome sequence data of this virus from S. invicta, which is valuable for future research on the DWV.,

Lake Sinai Viruses (LSV) are common ribonucleic acid (RNA) viruses of honey bees (Apis mellifera) that frequently reach high abundance but are not linked to overt disease. LSVs are genetically heterogeneous and collectively widespread, but despite frequent detection in surveys, the ecological and geographic factors structuring their distribution in A. mellifera are not understood. Even less is known about their distribution in other species. Better understanding of LSV prevalence and ecology have been hampered by high sequence diversity within the LSV clade. We developed a new genetic assay that detects all currently known lineages. We also performed pilot metagenetic sequencing to quantify the diversity of LSV sequences. The resulting data are summarized herein.

Lake Sinai Viruses (LSV) are common ribonucleic acid (RNA) viruses of honey bees (Apis mellifera) that frequently reach high abundance but are not linked to overt disease. LSVs are genetically heterogeneous and collectively widespread, but despite frequent detection in surveys, the ecological and geographic factors structuring their distribution in A. mellifera are not understood. Even less is known about their distribution in other species. Better understanding of LSV prevalence and ecology have been hampered by high sequence diversity within the LSV clade. We developed a new genetic assay that detects all currently known lineages. We also performed pilot metagenetic sequencing to quantify the diversity of LSV sequences. The resulting data are summarized herein.

Honey bees (Apis mellifera), a critical agricultural pollinator in many areas, have a high rate of infection with a large DNA virus, Apis mellifera filamentous virus (AmFV), yet little is known about its ecology or impact on honey bee colonies, other than its ubiquity and apparent low virulence. This study scanned over 5,000 public data sets to detect AmFV sequences in honey bees as well as a parasitic mite of honey bees, Varroa destructor, that is a potential vector of AmFV. The data release consists of these files: 1. AmFV.genome.assemblies.aligned.fas, which contains new AmFV draft genome sequences generated by this study aligned with existing reference genome accessions downloaded from the National Center for Biotechnology Information (NCBI). 2. kmer.list.txt, a list of kmers that were extracted from reference sequences and searched for in Sequence Read Archive (SRA) accessions. 3. sample.metadata.txt, which lists all accessions of the SRA, and NCBI database of high-throughput sequence data, that were used in this study. The file also includes the raw occurrence counts of kmers listed in kmer.lists.txt, summed by category.

Honey bees (Apis mellifera), a critical agricultural pollinator in many areas, have a high rate of infection with a large DNA virus, Apis mellifera filamentous virus (AmFV), yet little is known about its ecology or impact on honey bee colonies, other than its ubiquity and apparent low virulence. This study scanned over 5,000 public data sets to detect AmFV sequences in honey bees as well as a parasitic mite of honey bees, Varroa destructor, that is a potential vector of AmFV. The data release consists of these files: 1. AmFV.genome.assemblies.aligned.fas, which contains new AmFV draft genome sequences generated by this study aligned with existing reference genome accessions downloaded from the National Center for Biotechnology Information (NCBI). 2. kmer.list.txt, a list of kmers that were extracted from reference sequences and searched for in Sequence Read Archive (SRA) accessions. 3. sample.metadata.txt, which lists all accessions of the SRA, and NCBI database of high-throughput sequence data, that were used in this study. The file also includes the raw occurrence counts of kmers listed in kmer.lists.txt, summed by category.

A survey of public honey bee sequence data was performed to detect infections by Lake Sinai Virus (LSV). The Sequence Read Archive of the National Center for Biotechnology Information (NCBI) was queried to identify accessions of RNA sequence data derived from honey bee. These were filtered as described below and then up to 50 million reads or read pairs were downloaded and searched against a reference database of conserved LSV sequence. Accessions with matches above a specified threshold were downloaded in their entirety and assembled into longer contiguous sequences (contigs). The result contigs were searched against each open reading frame (ORF) of the reference LSV genome present in the NCBI database (accession NC_032433.1) and matching regions from each contig. These ORF sequences were aligned with additional sequences identified in NCBI databases through the BLAST web service. These alignments provide the basis for computing phylogenetic trees, rates of nucleotide substitution, codon usage bias, and other evolutionary parameters.

A survey of public honey bee sequence data was performed to detect infections by Lake Sinai Virus (LSV). The Sequence Read Archive of the National Center for Biotechnology Information (NCBI) was queried to identify accessions of RNA sequence data derived from honey bee. These were filtered as described below and then up to 50 million reads or read pairs were downloaded and searched against a reference database of conserved LSV sequence. Accessions with matches above a specified threshold were downloaded in their entirety and assembled into longer contiguous sequences (contigs). The result contigs were searched against each open reading frame (ORF) of the reference LSV genome present in the NCBI database (accession NC_032433.1) and matching regions from each contig. These ORF sequences were aligned with additional sequences identified in NCBI databases through the BLAST web service. These alignments provide the basis for computing phylogenetic trees, rates of nucleotide substitution, codon usage bias, and other evolutionary parameters.

,Varroa destructor are harmful ectoparasitic mites of Apis mellifera honey bees. Deformed wing-like viruses (DWV-A and B (VDV1)) are ubiquitous honey bee viruses that are vectored by Varroa; mite vectoring can cause an increase in virus infectivity and diversity of genetic variants. Beekeepers use both chemical (e.g., amitraz) and non-chemical (e.g., ‘brood break’) means to control mite populations in honey bee colonies, and these methods may be combined into an integrated pest management strategy. Here we explore how these control methods affected the DWV/VDV1 population in honey bee colonies, the diversity of viral genetic variants, and the competence of Varroa to transmit overt DWV infections. We found that ‘brood break’ treatment significantly elevated Varroa populations in colonies with a concomitant increase in DWV-A and VDV1 levels, but not when combined with amitraz application. Our results demonstrate negative implications to honey bee colony health from chemical treatment failures on the levels of DWV-like viruses in adult bees and mites, and the ability of mites to transmit overt infections.,

,These data represent V. destructor genomic annotations to be used for evolutionary comparison with other arthropods.,The ectoparasitic mite Varroa destructor has emerged as the primary pest of domestic honey bees (Apis mellifera). Here we present an initial survey of the V. destructor genome carried out to advance our understanding of Varroa biology and to identify new avenues for mite control. This sequence survey provides immediate resources for molecular and population-genetic analyses of Varroa-Apis interactions and defines the challenges ahead for a comprehensive Varroa genome project.,