Genetic characterization of a novel astrovirus in Pekin ducks

Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases
Qinfeng LiaoDabing Zhang

Abstract

Three divergent groups of duck astroviruses (DAstVs), namely DAstV-1, DAstV-2 (formerly duck hepatitis virus type 3) and DAstV-3 (isolate CPH), and other avastroviruses are known to infect domestic ducks. To provide more data regarding the molecular epidemiology of astroviruses in domestic ducks, we examined the prevalence of astroviruses in 136 domestic duck samples collected from four different provinces of China. Nineteen goose samples were also included. Using an astrovirus-specific reverse transcription-PCR assay, two groups of astroviruses were detected from our samples. A group of astroviruses detected from Pekin ducks, Shaoxing ducks and Landes geese were highly similar to the newly discovered DAstV-3. More interestingly, a novel group of avastroviruses, which we named DAstV-4, was detected in Pekin ducks. Following full-length sequencing and sequence analysis, the variation between DAstV-4 and other avastroviruses in terms of lengths of genome and internal component was highlighted. Sequence identity and phylogenetic analyses based on the amino acid sequences of the three open reading frames (ORFs) clearly demonstrated that DAstV-4 was highly divergent from all other avastroviruses. Further analyses showed that DAstV-4...Continue Reading

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Citations

Jan 28, 2016·Avian Pathology : Journal of the W.V.P.A·Ning LiuDabing Zhang
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