Molecular Epidemiology and Evolution of European Bat Lyssavirus 2
AbstractBat rabies cases in Europe are mainly attributed to two lyssaviruses, namely European Bat Lyssavirus 1 (EBLV-1) and European Bat Lyssavirus 2 (EBLV-2). Prior to the death of a bat worker in Finland in 1985, very few bat rabies cases were reported. Enhanced surveillance in the two subsequent years (1986–1987) identified 263 cases (more than a fifth of all reported cases to date). Between 1977 and 2016, 1183 cases of bat rabies were reported, with the vast majority (>97%) being attributed to EBLV-1. In contrast, there have been only 39 suspected cases of EBLV-2, of which 34 have been confirmed by virus typing and presently restricted to just two bat species; Myotis daubentonii and Myotis dasycneme. The limited number of EBLV-2 cases in Europe prompted the establishment of a network of European reference laboratories to collate all available viruses and data. Despite the relatively low number of EBLV-2 cases, a large amount of anomalous data has been published in the scientific literature, which we have here reviewed and clarified. In this review, 29 EBLV-2 full genome sequences have been analysed to further our understanding of the diversity and molecular evolution of EBLV-2 in Europe. Analysis of the 29 complete EBLV-2 genome sequences clearly corroborated geographical relationships with all EBLV-2 sequences clustering at the country level irrespective of the gene studied. Further geographical clustering was also observed at a local level. There are high levels of homogeneity within the EBLV-2 species with nucleotide identities ranging from 95.5–100% and amino acid identities between 98.7% and 100%, despite the widespread distribution of the isolates both geographically and chronologically. The mean substitution rate for EBLV-2 across the five concatenated genes was 1.65 × 10−5, and evolutionary clock analysis confirms the slow evolution of EBLV-2 both between and within countries in Europe. This is further supported by the first detailed EBLV-2 intra-roost genomic analysis whereby a relatively high sequence homogeneity was found across the genomes of three EBLV-2 isolates obtained several years apart (2007, 2008, and 2014) from M. daubentonii at the same site (Stokesay Castle, Shropshire, UK). View Full-Text
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McElhinney, L.M.; Marston, D.A.; Wise, E.L.; Freuling, C.M.; Bourhy, H.; Zanoni, R.; Moldal, T.; Kooi, E.A.; Neubauer-Juric, A.; Nokireki, T.; Müller, T.; Fooks, A.R. Molecular Epidemiology and Evolution of European Bat Lyssavirus 2. Int. J. Mol. Sci. 2018, 19, 156.
McElhinney LM, Marston DA, Wise EL, Freuling CM, Bourhy H, Zanoni R, Moldal T, Kooi EA, Neubauer-Juric A, Nokireki T, Müller T, Fooks AR. Molecular Epidemiology and Evolution of European Bat Lyssavirus 2. International Journal of Molecular Sciences. 2018; 19(1):156.Chicago/Turabian Style
McElhinney, Lorraine M.; Marston, Denise A.; Wise, Emma L.; Freuling, Conrad M.; Bourhy, Hervé; Zanoni, Reto; Moldal, Torfinn; Kooi, Engbert A.; Neubauer-Juric, Antonie; Nokireki, Tiina; Müller, Thomas; Fooks, Anthony R. 2018. "Molecular Epidemiology and Evolution of European Bat Lyssavirus 2." Int. J. Mol. Sci. 19, no. 1: 156.
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