Synthesised from the abstracts and full texts of the most-cited and representative papers within a harvested corpus of 177 records (164 open access). A curated review of landmark findings, not an exhaustive catalogue. SBPV is the least-studied of the core honey bee viruses. Generated 2026-06-12.
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Slow bee paralysis virus (SBPV) is a positive-sense, single-stranded RNA virus of the family Iflaviridae. Despite the name, it is unrelated to the (dicistrovirus) acute and chronic paralysis viruses. SBPV causes a paralysis that classically begins with the anterior two pairs of legs and kills affected adult bees roughly ten days after infection. Its most distinctive feature is its rarity and restricted distribution: in the largest survey to date its natural prevalence was under 2%, with positives found only in England and Switzerland. Like DWV, SBPV is transmitted by the mite Varroa destructor, which is thought to underlie what localised outbreaks do occur. This document synthesises the findings by theme and catalogues the landmark studies.
Slow bee paralysis virus is a member of the family Iflaviridae — the same family as deformed wing virus and sacbrood virus — and is therefore not related to the acute bee paralysis / Kashmir / Israeli acute paralysis dicistroviruses, nor to chronic bee paralysis virus, despite the shared word 'paralysis'. The name reflects the clinical course (a slowly developing paralysis), not the virus's phylogeny. Complete genome sequencing showed the SBPV genome is approximately 9.5 kb with a single open reading frame, flanked 5′ and 3′ UTRs and a naturally polyadenylated 3′ tail — the organization typical of iflaviruses (de Miranda 2010).
Two distinct SBPV strains have been characterised, named 'Rothamsted' and 'Harpenden', which are 83% identical at the nucleotide level and 94% at the amino-acid level, with the variation distributed unevenly across the genome (de Miranda 2010). Notably, the two strains were found to co-exist at different proportions within independently propagated virus preparations, indicating that mixed infections and within-host strain competition occur even in this otherwise rare virus (de Miranda 2010).
SBPV causes a characteristic, slowly progressing paralysis. The classical description is of paralysis that first affects the anterior two pairs of legs, rendering the bee unable to walk normally, with death following roughly ten days after infection — a slower course than the rapid kill of acute bee paralysis virus. As with most bee viruses, infection can remain covert; overt disease and mortality are associated with elevated titres, which in practice arise in colonies where the Varroa mite amplifies and transmits the virus.
SBPV's defining epidemiological feature is its rarity. In the largest survey to date — 847 colonies across 162 apiaries in five European countries — natural prevalence was under 2%, and positive samples were found only in England and Switzerland, in colonies with variable degrees of Varroa infestation (de Miranda 2010). This restricted, patchy distribution contrasts sharply with the near-ubiquitous DWV, SBV and BQCV. The association of the few positive colonies with Varroa infestation is consistent with the mite acting as the vector that enables localised SBPV outbreaks, mirroring the Varroa-driven emergence pattern seen for its iflavirus relative DWV.
J. General Virology · 2010 · 66 citations
Objective. Sequenced two SBPV strains and assessed natural prevalence across Europe.
Findings:
SBPV genome ~9.5 kb, single ORF, polyadenylated — typical Iflaviridae organization.
Two strains ('Rothamsted', 'Harpenden') are 83% identical (nt) / 94% (aa), variation uneven across the genome.
The two strains co-existed at different proportions in independent preparations.
Natural prevalence <2% across 847 colonies / 162 apiaries / 5 EU countries; positives only in England and Switzerland, in Varroa-infested colonies.
J. Animal Ecology · 2015 · 209 citations
Objective. National survey of RNA-virus prevalence in honey bees and bumblebees, incl. SBPV.
Findings:
Surveyed SBPV among a panel of honey bee RNA viruses across managed and wild bees.
Found that honey bee RNA viruses, generally, are shared with sympatric wild bumblebees.
Insects · 2020 · 132 citations
Objective. Synthesised global diversity and distribution of A. mellifera viruses.
Findings:
Places SBPV among the recognised but much rarer and more geographically restricted bee viruses.
Contrasts SBPV's limited distribution with the globally dominant DWV/SBV/BQCV.
J. Applied Ecology · 2015 · 112 citations
Objective. Reviewed drivers of viral spillover from managed to wild pollinators.
Findings:
Frames SBPV within the set of fast-evolving RNA viruses with potential to jump between pollinator hosts.
Highlights Varroa and commercial bee use as drivers of viral disease emergence.
This hub is a curated synthesis of representative and most-cited studies — not an exhaustive catalogue. The full SBPV corpus is searchable here.