Ranaviruses are globally significant pathogens of poikilothermic vertebrates (Duffus et al., 2015). The genus Ranavirus is one of six genera in the family Iridoviridae (subfamily Alphairidovirinae; Chinchar et al. 2017). They possess enveloped nucleocapsids with icosahedral symmetry that encapsidate the double-stranded DNA genome. Ranaviruses have been responsible for numerous disease episodes in both wild and managed populations of fish, amphibians, and reptiles, including endangered species (Duffus et al., 2015).

In 2011, the Global Ranavirus Consortium (GRC; www.ranavirus.org) was created after the First International Symposium on Ranaviruses (ISR) was held at the Joint Meeting of Ichthyologists and Herpetologists in Minnesota, USA. Since then, the GRC has been an active advocate for collaboration and continued research into all aspects of the biology of these viruses, including holding biennial international symposia. From 4 to 6 June 2019, the Fifth ISR was held at...

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