广东地区首例人博卡病毒的检出及鉴定

目的 建立人博卡病毒(HBoV)筛查检测平台,了解广东地区支气管肺炎患儿HBoV感染情况.方法 采用PCR技术筛查HBoV核蛋白(NP)基因片段,阳性标本作HBoV衣壳蛋白(VP)基因片段鉴定,并进行核酸序列和进化树分析.结果 从50例住院支气管肺炎患儿鼻咽分泌物中检测出1例HBoV,为广东地区首例,命名为GD-1株.HBoV VP基因部分序列分析与基因库中HBov VP基因序列同源性比对,除与韩国KNIH-2K6GJ2713株同源性为36%、与美国NH4549株同源性为77%外,与其他所有VP基因序列同源性均>95%,与法国株、北京株、加拿大株的同源性>98%.GD-1株HBoV部分VP基因片段与北京CZ株、加拿大株、西班牙株、意大利株等在同一基因进化簇主分枝中,与法国175/03/2002FRA株同在一个侧枝中.结论 广东地区存在HBoV感染,有进一步研究的必要性.

Detection and identification of first human bocavirus infection in Guangdong

Objective To study human bocavirus (HBoV) induced respiratory tract infection in Guangdong Province in China. Methods HBoV was deteced by using polymerase chain reaction (PCR) technology and was identified by DNA sequences. Results One strain of HBoV was detected and identified from 50 samples collected from children with acute respiratory tract infections. This was the first clinical case of HBoV infection reported in Guangdong and was named as GD-1 strain. The HBoV capsid protein (VP) gene amplified from the specimen by PCR was identified by sequencing and was compared with gene sequences in GenBank. Phylogenetic trees were constructed for sequence homology analysis. The nucleotides similarities between GD-1 and Beijing strains, France strains and Canada strains were over 98%, while the simlilarity was over 36% compared with Korea KNIH-2K6GJ2713 strain and over 77% compared with US NH4549 strain. Conclusion HBoV infection does exist in Guangdong Province. It is valuable to start systemic study on it.