Wide circulation of type 1 vaccine-derived poliovirus strains in clinical specimens from suspected cases of poliomyelitis, their contacts and in wastewater in Madagascar since late 2020.

Autor: Raharinantoanina J; Unité de Virologie, Institut Pasteur de Madagascar, Antananarivo, Madagascar. Electronic address: jonhson@pasteur.mg., Joffret ML; Institut Pasteur, Université de Paris Cité, CNRS UMR 3569, Virus Sensing and Signaling Unit, Paris, France; Laboratoire Associé Au Centre National de Référence Entérovirus/Paréchovirus, France., Bessaud M; Institut Pasteur, Université de Paris Cité, CNRS UMR 3569, Virus Sensing and Signaling Unit, Paris, France; Laboratoire Associé Au Centre National de Référence Entérovirus/Paréchovirus, France., Rakoto DAD; Ecole D'Enseignement Supérieure, Sciences de La Vie et de L'Environnement, Université D'Antananarivo, Antananarivo, Madagascar., Dussart P; Unité de Virologie, Institut Pasteur de Madagascar, Antananarivo, Madagascar., Lacoste V; Unité de Virologie, Institut Pasteur de Madagascar, Antananarivo, Madagascar., Razafindratsimandresy R; Unité de Virologie, Institut Pasteur de Madagascar, Antananarivo, Madagascar.
Jazyk: angličtina
Zdroj: Virology [Virology] 2024 Dec; Vol. 600, pp. 110253. Date of Electronic Publication: 2024 Sep 27.
DOI: 10.1016/j.virol.2024.110253
Abstrakt: Madagascar has faced three major outbreaks of vaccine-derived polioviruses (VDPVs) in recent decades, with VDPV type 1 reemerging in late 2020. Here, we report the molecular characterization of these cVDPV1 strains. WHO protocols were used for poliovirus detection in stool and wastewater samples. Molecular genotyping was based on the 5' non-coding (5'NC), VP1, and 3Dpol regions. From 2020 to 2022, 92 of 5690 stool samples and 129 of 1046 wastewater samples tested positive for cVDPV1. Genetic analysis of the VP1 gene revealed 1.3%-6.1% variability compared to the Sabin strain. Most sequences showed mutations at neurovirulence attenuation sites. Phylogenetic analysis distributed strains into four genogroups originating from Southern Madagascar. All analyzed cVDPV1 strains were recombinant, containing mutated oral polio vaccine sequences in VP1 and type C enterovirus sequences in other regions. This study demonstrated that all strains were closely related during this epidemic.
Competing Interests: Declaration of competing interest he authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Institut Pasteur de Madagascar. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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