Phylodynamic analysis of the historical spread of Toscana virus around the Mediterranean

Cusi, Maria Grazia and Gandolfo, Claudia and Gori Savellini, Gianni and Terrosi, Chiara and Sadler, Rebecca and Gatherer, Derek (2018) Phylodynamic analysis of the historical spread of Toscana virus around the Mediterranean. Biorxiv.

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Abstract

All available sequences of the three genome segments of Toscana virus with date and location of sampling were analysed using Bayesian phylodynamic methods. We estimate that extant Toscana virus strains had a common ancestor in the late 16th to early 17th century AD, in territories controlled by the Ottoman Empire, giving rise to an ancestral genotype A/B in north Africa and to genotype C in the Balkans. Subsequent spread into western Europe may have occurred during the period of European colonization of north Africa in the 19th and early 20th centuries AD, establishing genotypes A and B in Italy and Spain respectively. Very little positive evolutionary selection pressure is detectable in Toscana virus, suggesting that the virus has become well adapted to its human hosts. There is also no convincing evidence of reassortment between genome segments, despite genotypes A and B now co-circulating in several countries.

Item Type:
Journal Article
Journal or Publication Title:
Biorxiv
Subjects:
ID Code:
126661
Deposited By:
Deposited On:
31 Jul 2018 12:50
Refereed?:
No
Published?:
Published
Last Modified:
22 Jan 2020 04:10