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Journal Articles Emerging Infectious Diseases Year : 2021

Vaccine-Derived Polioviruses, Central African Republic, 2019

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Abstract

Since May 2019, the Central African Republic has experienced a poliomyelitis outbreak caused by type 2 vaccine-derived polioviruses (VDPV-2s). The outbreak affected Bangui, the capital city, and 10 districts across the country. The outbreak resulted from several independent emergence events of VDPV-2s featuring recombinant genomes with complex mosaic genomes. The low number of mutations (<20) in the viral capsid protein 1-encoding region compared with the vaccine strain suggests that VDPV-2 had been circulating for a relatively short time (probably <3 years) before being isolated. Environmental surveillance, which relies on a limited number of sampling sites in the Central African Republic and does not cover the whole country, failed to detect the circulation of VDPV-2s before some had induced poliomyelitis in children.
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Dates and versions

pasteur-03122581 , version 1 (27-01-2021)

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Attribution - CC BY 4.0

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Marie-Line Joffret, Joël Wilfried Doté, Nicksy Gumede, Marco Vignuzzi, Maël Bessaud, et al.. Vaccine-Derived Polioviruses, Central African Republic, 2019. Emerging Infectious Diseases, 2021, 27 (2), pp.620-623. ⟨10.3201/eid2702.203173⟩. ⟨pasteur-03122581⟩
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