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Emergence of Vaccine-derived Polioviruses, Democratic Republic of Congo, 2004–2011

机译:疫苗衍生的脊髓灰质炎病毒的出现,刚果民主共和国,2004-2011年

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Polioviruses isolated from 70 acute flaccid paralysis patients from the Democratic Republic of Congo (DRC) during 2004–2011 were characterized and found to be vaccine- derived type 2 polioviruses (VDPV2s). Partial genomic sequencing of the isolates revealed nucleotide sequence divergence of up to 3.5% in the viral protein 1 capsid region of the viral genome relative to the Sabin vaccine strain. Genetic analysis identified at least 7 circulating lineages localized to specific geographic regions. Multiple independent events of VDPV2 emergence occurred throughout DRC during this 7-year period. During 2010–2011, VDPV2 circulation in eastern DRC occurred in an area distinct from that of wild poliovirus circulation, whereas VDPV2 circulation in the southwestern part of DRC (in Kasai Occidental) occurred within the larger region of wild poliovirus circulation.
机译:从2004年至2011年从70名来自刚果民主共和国(DRC)的急性弛缓性麻痹患者中分离出的脊髓灰质炎病毒的特征被发现是疫苗衍生的2型脊髓灰质炎病毒(VDPV2s)。分离物的部分基因组测序显示,相对于Sabin疫苗株,病毒基因组的病毒蛋白1衣壳区域的核苷酸序列差异高达3.5%。遗传分析确定了至少7个位于特定地理区域的循环血统。在这7年期间,整个DRC发生了多个VDPV2出现的独立事件。在2010-2011年期间,刚果民主共和国东部的VDPV2循环发生在不同于野生脊髓灰质炎病毒的区域,而刚果(金)西南部(西开赛)的VDPV2循环发生在野生脊髓灰质炎病毒的较大区域内。

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