Li Yang, Zhang Xiangping, Zhai Mingqiang, Huang Xueyong, Li Yi
Bing Du Xue Bao. 2016 May;32(3):324-30.
This study aims to investigate the etiologic spectrum features of hand, foot and mouth disease(HFMD)and the VP1 region of coxsackievirus A6(CV-A6)in the Anyang area of China during 2013.A total of 479 HFMD fecal specimens were identified using real-time RT-PCR. The positive specimens of the different serotypes and the proportion of each serotype were calculated. A total of 10 positive of CV-A6 specimens were amplified and sequenced to obtain the profile of the VP1 region. Based on the data of the VP1 sequences from the Anyang strains and other referenced strains deposited in the NCBI database, the similarities of the nucleotide and amino-acid sequences for the VP1 region, as well as phylogenetic analyses were performed by the BIOEIDT 7.2and MEGA 5.1software packages. The results revealed that 429 positive specimens of enterovirus, including 90 positive specimens of CV-A6 were identified. The CV-A6 specimens accounted for 20.98%of the total positive specimens.CV-A6 had become the second preponderant pathogen of the HFMD in the Anyang area during 2013.It was the first record of an enterovirus serotype of which was neither CV-A16 nor EV-A71,had become one of the primary pathogens associated with HFMD in the region. A great diversity of the nucleotide and amino-acid sequences between 10 Anyang strains and a prototype strain (Gdula) was found. Compared with the Henan strain(HN421),four Anyang sequences with nucleotide and amino-acid sequences exhibited greater diversity than the other six Anyang sequences. The phylogenetic analysis showed that all of 49CV-A6 strains could be clustered into four branches. Branch D could be further clustered into two sub-branches;6 Anyang sequences belonged to sub-branch D1,and the other four belonged to sub-branch D2.
本研究旨在调查2013年中国安阳地区手足口病(HFMD)的病因谱特征以及柯萨奇病毒A6(CV-A6)的VP1区域。使用实时逆转录聚合酶链反应(RT-PCR)鉴定了479份手足口病粪便标本。计算不同血清型的阳性标本及各血清型所占比例。对10份CV-A6阳性标本进行扩增和测序以获得VP1区域图谱。基于安阳毒株和NCBI数据库中其他参考毒株的VP1序列数据,使用BIOEIDT 7.2和MEGA 5.1软件包进行VP1区域核苷酸和氨基酸序列的相似性分析以及系统发育分析。结果显示,共鉴定出429份肠道病毒阳性标本,其中包括90份CV-A6阳性标本。CV-A6标本占总阳性标本的20.98%。2013年CV-A6已成为安阳地区手足口病的第二大优势病原体。这是首次记录到既非CV-A16也非EV-A71的肠道病毒血清型成为该地区手足口病的主要病原体之一。发现10株安阳毒株与原型毒株(Gdula)之间的核苷酸和氨基酸序列存在很大差异。与河南毒株(HN421)相比,4份安阳序列的核苷酸和氨基酸序列比其他6份安阳序列表现出更大的差异。系统发育分析表明,49株CV-A6毒株可分为4个分支。分支D可进一步分为两个亚分支;6份安阳序列属于亚分支D1,另外4份属于亚分支D2。