pathology, isolation, and preliminary molecular characterization of a novel iridovirus from tiger salamanders in saskatchewan.all iridovirus was confirmed to be the cause of an epizootic in larval and adult tiger salamanders (ambystoma tigrinum diaboli) from four separate ponds in southern saskatchewan (canada) during the summer of 1997. this organism also is suspected, based on electron microscopic findings, to be the cause of mortality of larval tiger salamanders in a pond over 200 km to the north during the same year. salamanders developed a generalized viremia which resulted in various lesions including: necrotizin ...199910479075
diagnostic and molecular evaluation of three iridovirus-associated salamander mortality 1998 viruses were isolated from tiger salamander larvae (ambystoma tigrinum diaboli and a. tigrinum melanostictum) involved in north dakota and utah (usa) mortality events and spotted salamander (a. maculatum) larvae in a third event in maine (usa). although sympatric caudates and anurans were present at all three sites only ambystomid larvae appeared to be affected. mortality at the north dakota site was in the thousands while at the utah and maine sites mortality was in the hundreds. sick l ...200314567216
genomic sequence of a ranavirus (family iridoviridae) associated with salamander mortalities in north america.disease is among the suspected causes of amphibian population declines, and an iridovirus and a chytrid fungus are the primary pathogens associated with amphibian mortalities. ambystoma tigrinum virus (atv) and a closely related strain, regina ranavirus (rrv), are implicated in salamander die-offs in arizona and canada, respectively. we report the complete sequence of the atv genome and partial sequence of the rrv genome. sequence analysis of the atv/rrv genomes showed marked similarity to other ...200314599794
complete sequence determination of a novel reptile iridovirus isolated from soft-shelled turtle and evolutionary analysis of iridoviridae.soft-shelled turtle iridovirus (stiv) is the causative agent of severe systemic diseases in cultured soft-shelled turtles (trionyx sinensis). to our knowledge, the only molecular information available on stiv mainly concerns the highly conserved stiv major capsid protein. the complete sequence of the stiv genome is not yet available. therefore, determining the genome sequence of stiv and providing a detailed bioinformatic analysis of its genome content and evolution status will facilitate furthe ...200919439104
selected emerging diseases of amphibia.this review summarizes the most recent updates on emerging infectious diseases of amphibia. a brief summary of batrachochytrium dendrobatidis history, epidemiology, pathogenesis, life cycle, diagnosis, treatment, and biosecurity is provided. ambystoma tigrinum virus, common midwife toad virus, frog virus 3, rana grylio virus, rana catesbeiana ranavirus, mahaffey road virus, rana esculenta virus, bohle iridovirus, and tiger frog virus ranaviruses are extensively reviewed. emerging bacterial patho ...201323642863
low detection of ranavirus dna in wild postmetamorphic green frogs, rana (lithobates) clamitans, despite previous or concurrent tadpole mortality.ranavirus (iridoviridae) infection is a significant cause of mortality in amphibians. detection of infected individuals, particularly carriers, is necessary to prevent and control outbreaks. recently, the use of toe clips to detect ranavirus infection through pcr was proposed as an alternative to the more frequently used lethal liver sampling in green frogs (rana [lithobates] clamitans). we attempted reevaluate the use of toe clips, evaluate the potential use of blood onto filter paper and hepat ...201324502715
pathogen richness and abundance predict patterns of adaptive major histocompatibility complex variation in insular amphibians.the identification of the factors responsible for genetic variation and differentiation at adaptive loci can provide important insights into the evolutionary process and is crucial for the effective management of threatened species. we studied the impact of environmental viral richness and abundance on functional diversity and differentiation of the mhc class ia locus in populations of the black-spotted pond frog (pelophylax nigromaculatus), an iucn-listed species, on 24 land-bridge islands of t ...201728734069
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