Whole genome characterization of a chelonian orthoreovirus strain identifies significant genetic diversity and may classify reptile orthoreoviruses into distinct species
2016
Kugler, Renáta | Marschang, Rachel E. | Ihász, Katalin | Lengyel, György | Jakab, Ferenc | Bányai, Krisztián | Farkas, Szilvia L.
In this study we report the sequence and phylogenetic characterization of an orthoreovirus strain, CH1197/96, isolated from a spur-thighed tortoise (Testudo graeca) on chicken embryo fibroblast cells. The 23,957bp long genome sequence was obtained by combined use of semiconductor and capillary sequencing. Although the genomic characterization showed that the virus was most similar to the bush viper reovirus strain, 47/02, and in phylogenies performed with all segments the two strains formed a monophyletic group, the nucleotide (48.4–70.3%) and amino acid (39.2–80.7%) sequence identity values were moderate between the two reptile origin reoviruses. Based on our results and existing classification criteria for the genus Orthoreovirus, the tortoise reovirus strain CH1197/96 might be the first representative of a novel reptilian origin Orthoreovirus species.
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