Multiple novel astrovirus species in human stool.

Multiple novel astrovirus species in human stool.
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DOI:
10.1099/vir.0.014449-0
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发表时间:
2009-12
期刊:
The Journal of general virology
影响因子:
--
通讯作者:
Delwart E
Delwart E
中科院分区:
其他
文献类型:
--
作者:
Kapoor A;Li L;Victoria J;Oderinde B;Mason C;Pandey P;Zaidi SZ;Delwart E

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Diarrhea remains a significant cause of morbidity and mortality in developing countries where numerous cases remain without identified etiology. Astroviruses are a recently identified cause of animal gastroenteritis which currently includes two species suspected of causing human diarrhea. Using a combination of viral metagenomics and pan-astrovirus RT-PCR we analyzed human stools samples from different continents for astrovirus related RNA sequences. We identified variants of the two known human astrovirus species plus, based on genetic distance criteria, three novel astrovirus species all distantly related to mink and ovine astroviruses which we provisionally named HMOAstV species A through C. A complete genome of species A displayed all the conserved characteristics of mammalian astroviruses. Each of the now three groups of astroviruses found in human stool (HAstV, AstV-MLB, HMOAstV) being more closely related to animal astroviruses than to each other indicates that human astroviruses may periodically emerge from zoonotic transmissions. Based on the pathogenic impact of their closest phylogenetic relatives in animal further investigations of the role of HMOAstV, so far detected in Nigeria, Nepal and Pakistan, in human gastroenteritis are warranted.
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