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A decade of advances in iridovirus research

Por: Williams, Trevor. Doctor [autor/a].
Barbosa Solomieu, Valérie [autor/a] | Chinchar, V. Gregory [autor/a].
Tipo de material: Artículo ArtículoTema(s): Iridovirus | Virus de los vertebrados | Taxonomía animalTema(s) en inglés: Iridoviruses | Vertebrate viruses | Animal taxonomyNota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso En: Advances in Virus Research. volumen 65 (2005), páginas 173-248. --ISSN: 0065-3527Número de sistema: 36962Resumen:
Inglés

This chapter focuses on the advances in iridovirus research over the past decade. It summarizes salient features of the iridovirus research studies, and discusses their importance to future work. As knowledge of iridovirus biology increases, so does the understanding of the taxonomic structure of the family. A new genus (Megalocytivirus) has recently been created to accommodate a number of viruses isolated from diseased fish in Southeast Asia, and an established one (Chloriridovirus) is about to be validated following the sequencing of the genome of the mosquito pathogen IIV-3. Genomic sequencing projects have clarified evolutionary relationships between iridoviruses and other families of large, nucleocytoplasmic DNA viruses. Iridoviruses appear situated at the center of a clade of DNA viruses that include the poxviruses, phycodnaviruses, ASFV, ascoviruses, and possibly a new giant virus of amoebae (mimivirus). Not all iridovirus infections result in mortal disease. The recognition that many iridovirus infections are chronic, especially among insects, should stimulate studies on the importance of such illnesses on host fitness. Sublethal effects have been demonstrated in infected insects, and theoretical studies suggest such effects have a major influence on the dynamics of host populations. However, the consequences of chronic disease on the demography (fecundity, fertility, death rate, etc.) of infected amphibian and fish populations are notable by their absence. The ability to detect iridovirus infections has advanced markedly with the adoption of highly sensitive loop-mediated isothermal amplification and multiplex polymerase chain reaction techniques for rapid diagnosis of infected individuals.

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This chapter focuses on the advances in iridovirus research over the past decade. It summarizes salient features of the iridovirus research studies, and discusses their importance to future work. As knowledge of iridovirus biology increases, so does the understanding of the taxonomic structure of the family. A new genus (Megalocytivirus) has recently been created to accommodate a number of viruses isolated from diseased fish in Southeast Asia, and an established one (Chloriridovirus) is about to be validated following the sequencing of the genome of the mosquito pathogen IIV-3. Genomic sequencing projects have clarified evolutionary relationships between iridoviruses and other families of large, nucleocytoplasmic DNA viruses. Iridoviruses appear situated at the center of a clade of DNA viruses that include the poxviruses, phycodnaviruses, ASFV, ascoviruses, and possibly a new giant virus of amoebae (mimivirus). Not all iridovirus infections result in mortal disease. The recognition that many iridovirus infections are chronic, especially among insects, should stimulate studies on the importance of such illnesses on host fitness. Sublethal effects have been demonstrated in infected insects, and theoretical studies suggest such effects have a major influence on the dynamics of host populations. However, the consequences of chronic disease on the demography (fecundity, fertility, death rate, etc.) of infected amphibian and fish populations are notable by their absence. The ability to detect iridovirus infections has advanced markedly with the adoption of highly sensitive loop-mediated isothermal amplification and multiplex polymerase chain reaction techniques for rapid diagnosis of infected individuals. eng

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