Article (Scientific journals)
Evolutionary and temporal dynamics of emerging influenza D virus in Europe (2009-22).
Gaudino, Maria; Chiapponi, Chiara; Moreno, Ana et al.
2022In Virus Evolution, 8 (2), p. 081
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Keywords :
cattle; epidemiology; influenza D virus; molecular clock; swine; viroprevalence; virus evolution; zoonosis; Microbiology; Virology
Abstract :
[en] Influenza D virus (IDV) is an emerging influenza virus that was isolated for the first time in 2011 in the USA from swine with respiratory illness. Since then, IDV has been detected worldwide in different animal species, and it was also reported in humans. Molecular epidemiological studies revealed the circulation of two major clades, named D/OK and D/660. Additional divergent clades have been described but have been limited to specific geographic areas (i.e. Japan and California). In Europe, IDV was detected for the first time in France in 2012 and subsequently also in Italy, Luxembourg, Ireland, the UK, Switzerland, and Denmark. To understand the time of introduction and the evolutionary dynamics of IDV on the continent, molecular screening of bovine and swine clinical samples was carried out in different European countries, and phylogenetic analyses were performed on all available and newly generated sequences. Until recently, D/OK was the only clade detected in this area. Starting from 2019, an increase in D/660 clade detections was observed, accompanied by an increase in the overall viral genetic diversity and genetic reassortments. The time to the most recent common ancestor (tMRCA) of all existing IDV sequences was estimated as 1995-16 years before its discovery, indicating that the virus could have started its global spread in this time frame. Despite the D/OK and D/660 clades having a similar mean tMRCA (2007), the mean tMRCA for European D/OK sequences was estimated as January 2013 compared to July 2014 for European D/660 sequences. This indicated that the two clades were likely introduced on the European continent at different time points, as confirmed by virological screening findings. The mean nucleotide substitution rate of the hemagglutinin-esterase-fusion (HEF) glycoprotein segment was estimated as 1.403 × 10-3 substitutions/site/year, which is significantly higher than the one of the HEF of human influenza C virus (P < 0.0001). IDV genetic drift, the introduction of new clades on the continent, and multiple reassortment patterns shape the increasing viral diversity observed in the last years. Its elevated substitution rate, diffusion in various animal species, and the growing evidence pointing towards zoonotic potential justify continuous surveillance of this emerging influenza virus.
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Gaudino, Maria;  IHAP, Université de Toulouse, INRAE, ENVT, Toulouse 31076, France
Chiapponi, Chiara;  Department of Virology, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna 'Bruno Ubertini', Brescia 25124, Italy
Moreno, Ana;  Department of Virology, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna 'Bruno Ubertini', Brescia 25124, Italy
Zohari, Siamak;  Department of microbiology, National Veterinary Institute, Uppsala SE-751 89, Sweden
O'Donovan, Tom;  Central Veterinary Research Laboratory, Celbridge, Co. Kildare W23 X3PH, Ireland
Quinless, Emma;  Central Veterinary Research Laboratory, Celbridge, Co. Kildare W23 X3PH, Ireland
Sausy, Aurélie;  Clinical and Applied Virology Group, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette L-4354, Luxembourg
Oliva, Justine;  IHAP, Université de Toulouse, INRAE, ENVT, Toulouse 31076, France
Salem, Elias;  IHAP, Université de Toulouse, INRAE, ENVT, Toulouse 31076, France
Fusade-Boyer, Maxime;  IHAP, Université de Toulouse, INRAE, ENVT, Toulouse 31076, France
Meyer, Gilles;  IHAP, Université de Toulouse, INRAE, ENVT, Toulouse 31076, France
Hübschen, Judith M;  Clinical and Applied Virology Group, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette L-4354, Luxembourg
Saegerman, Claude  ;  Université de Liège - ULiège > Département des maladies infectieuses et parasitaires (DMI) > Epidémiologie et analyse des risques appliqués aux sciences vétérinaires  ; IHAP, Université de Toulouse, INRAE, ENVT, Toulouse 31076, France
Ducatez, Mariette F ;  Fundamental and Applied Research for Animals and Health (FARAH) Center, University of Liège, Liège 4000, Belgium
Snoeck, Chantal J ;  Clinical and Applied Virology Group, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette L-4354, Luxembourg
More authors (5 more) Less
Language :
English
Title :
Evolutionary and temporal dynamics of emerging influenza D virus in Europe (2009-22).
Publication date :
2022
Journal title :
Virus Evolution
eISSN :
2057-1577
Publisher :
Oxford University Press, England
Volume :
8
Issue :
2
Pages :
veac081
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
EFSA - European Union. European Food Safety Authority [IT]
Funding text :
The authors wish to thank M. Bourg and A. Schoos for sample collection and A. Sausy for technical help. We are grateful to the genotoul bioinformatics platform Toulouse Midi-Pyrenees and the Sigenae group for providing help and/or computing and/or storage resources thanks to Galaxy instance http://sigenaeworkbench.toulouse.inra.fr. M.G., J.O., E.S., M.F.-B., G.M., and M.F.D. are members of the French research network on influenza viruses (ResaFlu; GDR2073) financed by the Centre national de la recherche scientifique. This study was funded by the European Food Safety Agency (Grant Agreement Numbers GP/EFSA/AFSCO/2017/01—GA04 and GP/EFSA/ENCO/2020/03); the Luxembourg Institute of Health, the Ministry of Agriculture, Viticulture and Rural Development of Luxembourg; and the French National Agency for Research, project ANR-15-CE35-0005 ‘FLUD’. M.G. is supported by a PhD scholarship funded by the Département Santé Animale (INRAE Toulouse) and the Région Occitanie.
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