Molecular evolution of enterovirus 68 detected in the Philippines.

Molecular evolution of enterovirus 68 detected in the Philippines.
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DOI:
10.1371/journal.pone.0074221
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Oshitani H
Oshitani H
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Imamura T;Suzuki A;Lupisan S;Okamoto M;Aniceto R;Egos RJ;Daya EE;Tamaki R;Saito M;Fuji N;Roy CN;Opinion JM;Santo AV;Macalalad NG;Tandoc A 3rd;Sombrero L;Olveda R;Oshitani H

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肠道病毒68(EV 68)的检测最近有所增加。然而,这一增长趋势的潜在演变机制尚未完全了解。从2009年6月至2011年12月期间在菲律宾收集了5,240名急性呼吸道感染患者的鼻咽拭子。用PCR方法检测EV 68的5′非翻译区(5′UTR)、病毒蛋白1(VP 1)和VP 4/VP 2。使用获得的序列生成系统发育树。2011年8月至12月,在5,240份检测样本中,检出12例EV 68阳性病例(检出率为0.23%)。住院患者的检出率高于门诊患者(P<0.0001)。在2011年从7名患者中检测到的VP 1序列中,谱系2中的5个与2008年在菲律宾检测到的序列不同,然而,谱系3中的2个与2008年在菲律宾检测到的菌株没有不同,但与在美国检测到的菌株密切相关。结合我们以前的报告,在过去四年里,菲律宾观察到两次EV 68的发生。EV 68的检测可能是以循环模式发生的,病毒可能一直存在于社区中,而一些菌株可能是新引入的。
Detection of Enterovirus 68 (EV68) has recently been increased. However, underlying evolutionary mechanism of this increasing trend is not fully understood. Nasopharyngeal swabs were collected from 5,240 patients with acute respiratory infections in the Philippines from June 2009 to December 2011. EV68 was detected by polymerase chain reaction (PCR) targeting for 5′ untranslated region (5′UTR), viral protein 1 (VP1), and VP4/VP2. Phylogenetic trees were generated using the obtained sequences. Of the 5,240 tested samples, 12 EV68 positive cases were detected between August and December in 2011 (detection rate, 0.23%). The detection rate was higher among inpatients than outpatients (p<0.0001). Among VP1 sequences detected from 7 patients in 2011, 5 in lineage 2 were diverged from those detected in the Philippines in 2008, however, 2 in lineage 3 were not diverged from strains detected in the Philippines in 2008 but closely associated with strains detected in the United States. Combined with our previous report, EV68 occurrences were observed twice in the Philippines within the last four years. EV68 detections might be occurring in cyclic patterns, and viruses might have been maintained in the community while some strains might have been newly introduced.
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