Sea star-associated densovirus
Group II (ssDNA)
|Sea star-associated densovirus|
Sea star-associated densovirus (SSaDV) belongs to the Parvoviridae family. Like the other members of its family, it is a single-stranded DNA virus. SSaDV has been suggested to be an etiological agent of sea star wasting disease, but conclusive evidence has not yet been obtained.
SSaDV affects sea stars from southern Alaska to Baja California. It tends to occur in large outbreaks with high mortality, as it has in 1972, 1978, 2013, and 2014. See Sea star wasting disease. The virus was isolated from wasting Pycnopodia helianthoides, and detected in small quantities in healthy sea stars and aquarium sediments. The highest viral load was found in the body wall of the central disk.
The physical characteristics of SSaDV are similar to the other members of the genus Ambidensovirus. It is the only viral candidate proposed to cause wasting in sea stars, and is predicted to be a non-enveloped icosahedral particle at ~25 nm.
- Hewson, Ian; Button, Jason B.; Gudenkauf, Brent M.; Miner, Benjamin; Newton, Alisa L.; Gaydos, Joseph K.; Wynne, Janna; Groves, Cathy L.; Hendler, Gordon (December 2014). "Densovirus associated with sea-star wasting disease and mass mortality". Proc. Natl. Acad. Sci. U.S.A. 111 (48): 17278–83. doi:10.1073/pnas.1416625111. PMC 4260605. PMID 25404293.
- Gazzo, Kate (22 November 2014). "Loss of Sea Stars Could Collapse Marine Communities". Blog. Great Ecology.
- Grenet AS, Salasc F, Francois S, Mutuel D, Dupressoir T, Multeau C, Perrin A, Ogliastro M (January 2015). "Les densovirus: une "massive attaque" chez les arthropodes". Virologie. 19 (1): 19–31. doi:10.1684/vir.2015.0589.
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