Emergence of G12 Rotavirus Strains in Delhi, India, in 2000 to 2007

Emergence of G12 Rotavirus Strains in Delhi, India, in 2000 to 2007
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2000 年至 2007 年印度德里出现 G12 轮状病毒株

DOI:
10.1128/jcm.02358-07
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发表时间:
2008
影响因子:
9.4
通讯作者:
M. K. Bhan
M. K. Bhan
中科院分区:
医学2区
文献类型:
--
作者:
Sumit Sharma;P. Ray;J. Gentsch;R. Glass;V. Kalra;M. K. Bhan

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儿童轮状病毒腹泻可能很快通过疫苗预防的前景使了解轮状病毒毒株的多样性和这些毒株随时间演变的机制成为一个新的优先事项。我们已经确定了从2000年至2007年在印度北部收集的465株轮状病毒株的特征,通过逆转录-PCR和测序的G和P型。最近在其他国家发现的新型G12轮状病毒株于2001年首次在印度发现,并在2005年至2007年期间成为印度德里的主要毒株。虽然VP 7序列在德里分离的G12菌株中高度同源,表明最近从一个共同的祖先出现,但这些菌株具有其他基因片段的多样性,表现出大量的重配。在整个期间,常见的轮状病毒G型G1(26%)、G2(25%)和G9(14%)占65%的毒株,常见的P型P[4](19%)、P[6](22%)和P[8](35%)占总P型的76%。值得注意的是,我们检测到高比例的不寻常(17%)菌株和粪便标本混合(12%G和15%P)轮状病毒感染具有各种基因组星座。我们首次在腹泻患者中鉴定出两种具有不寻常G/P组合的新型轮状病毒株,G2 P [11]和G3 P [11]。该研究强调了从印度儿童中分离的轮状病毒之间的巨大多样性,菌株之间遗传重配的机会,以及我国出现的新型G12菌株。由于抗原多样性对轮状病毒疫苗的影响已得到证实,因此在印度实施轮状病毒疫苗计划时,继续仔细监测这些毒株将非常重要。
ABSTRACT The prospect that rotavirus diarrhea in children may soon be prevented by vaccines has placed a new priority on understanding the diversity of rotavirus strains and the mechanism by which these strains evolve over time. We have characterized a total of 465 rotavirus strains collected in North India from 2000 to 2007 for G and P types by reverse transcription-PCR and sequencing. The novel G12 rotavirus strains recently detected in other countries were first detected in India in 2001 and have emerged as the predominant strains in Delhi, India, during 2005 to 2007. While the VP7 sequence was highly homologous among G12 strains isolated in Delhi, suggesting recent emergence from a common ancestor, the strains had a diverse constellation of other gene segments, demonstrating substantial reassortment. For the entire period, the common rotavirus G types G1 (26%), G2 (25%), and G9 (14%) comprised 65% of the strains, and common P types, P[4] (19%), P[6] (22%), and P[8] (35%), comprised 76% of the total P types. Of note, we detected a high percentage of unusual (17%) strains and fecal specimens with mixed (12% G and 15% P) rotavirus infections having a variety of genomic constellations. For the first time, we identified two novel rotavirus strains with unusual G/P combinations, G2P[11] and G3P[11], in patients with diarrhea. The study highlights the great diversity among rotaviruses isolated from Indian children, the opportunity for genetic reassortment between strains, and the emergence of a novel G12 strain in our country. Due to the demonstrated effect of antigenic diversity on rotavirus vaccines, it will be important to continue careful monitoring of these strains as rotavirus vaccine programs are implemented in India.
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影响因子: --
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