Epidemiological and Clinical Insights into the Enterovirus D68 Upsurge in Europe 2021-2022 and Emergence of Novel B3-Derived Lineages, ENPEN Multicentre Study.

Margarida Pires Simoes,Emma B. Hodcroft，Heli Harvala,Kimberley S. M. Benschop

JOURNAL OF INFECTIOUS DISEASES（2024）

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Abstract

Enterovirus D68 (EV-D68) infections are associated with severe respiratory disease and acute flaccid myelitis (AFM). The European Non-Polio Enterovirus Network (ENPEN) aimed to investigate the epidemiological and genetic characteristics of EV-D68 infections and its clinical impact during the fall-winter season of 2021-2022. From 19 European countries, 58 institutes reported 10 481 (6.8%) EV-positive samples of which 1004 (9.6%) were identified as EV-D68 (including 852 respiratory samples). Clinical data were reported for 969 cases; 78.9% of infections were reported in children (0-5 years); and 37.9% of cases were hospitalized. Acute respiratory distress was commonly noted (93.1%) followed by fever (49.4%). Neurological problems were observed in 6.4% of cases including 6 diagnosed with AFM. Phylodynamic/Nextstrain and phylogenetic analyses based on 694 sequences showed the emergence of 2 novel B3-derived lineages, with no regional clustering. In conclusion, we describe a large-scale European EV-D68 upsurge with severe clinical impact and the emergence of B3-derived lineages.

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Key words

enterovirus D68 (EV-D68),respiratory infection,nonpolio enterovirus (NPEV),European Non-Polio Enterovirus Network (ENPEN),acute flaccid myelitis (AFM)

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