No Evidence of Direct Transmission of Emerging Bluetongue Virus Strains Between Israel and Europe Based on Genomic Analyses (2013–2023)
Natalia Golender, Eyal Klement, Bernd Hoffmann
TL;DR
The study finds that Bluetongue virus strains in Israel and Europe evolved separately, with no direct transmission between the two regions over the past decade.
Contribution
The study provides genomic evidence refuting direct transmission of Bluetongue virus between Israel and Europe.
Findings
Israeli and European Bluetongue virus strains share African ancestors but have diverged independently.
Genomic differences of 2–3% suggest several years of separate evolution between Israeli and European strains.
Genomic 'incursions' from Mayotte Island or the Arabian Peninsula are more common in Israeli strains.
Abstract
Bluetongue (BT) is an arthropod-borne viral disease primarily affecting domestic and wild ruminants. In recent years, several BTV serotypes and genotypes have been detected in Israel almost annually, raising questions about their origin and routes of introduction. Some BTV serotypes closely related to those first identified in Israel, including BTV-3, BTV-8, and BTV-12, were subsequently reported in Europe after a delay of several years. In this study, we sequenced the complete genomes of one representative strain of all newly identified Israeli BTV genotypes/serotypes—BTV-1, -4, -5, -8, and -11—first detected between 2021 and 2023. Additionally, complete sequences of enzootic Israeli BTV (2015) and eleven BTV-3 strains (2019–2023), with two representative strains for every year of isolation, except 2021 (three strains), were analyzed using phylogenetic, BLAST, and pairwise identity…
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Taxonomy
TopicsVector-Borne Animal Diseases · Virology and Viral Diseases · Animal Disease Management and Epidemiology