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Genetic diversity of astroviruses detected in wild aquatic birds in Hong Kong
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Genetic diversity of astroviruses detected in wild aquatic birds in Hong Kong
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Genetic diversity of astroviruses detected in wild aquatic birds in Hong Kong
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Journal Article
Genetic diversity of astroviruses detected in wild aquatic birds in Hong Kong
2024
Overview
Wild waterfowl serve as a reservoir of some astroviruses. Fecal samples from wild waterfowl collected at Hong Kong's Marshes were tested using pan-astrovirus reverse transcription-PCR. Positive samples underwent subsequent host identification using DNA barcoding. Based on deduced partial sequences, noteworthy samples from three astrovirus groups (mammalian, avian and unclassified astroviruses) were further analyzed by next-generation sequencing. One sample of
Avastrovirus
4 clade, MP22-196, had a nearly complete genome identified. The results of ORF2 phylogenetic analysis and genetic distance analysis indicate that
Avastrovirus
4 is classified as a distinct subclade within
Avastrovirus
. MP22-196 has typical astrovirus genome characteristics. The unique characteristics and potential differences of this genome, compared to other avian astrovirus sequences, involve the identification of a modified sgRNA sequence situated near the ORF2 start codon, which precedes the ORF1b stop codon. Additionally, the 3' UTR of MP22-196 is shorter than other avian astroviruses. This study expands our understanding of the
Avastrovirus
4 clade.
Publisher
BioMed Central,BioMed Central Ltd,BMC
Subject
/ Animals as carriers of disease
/ Astroviridae - classification
/ Astroviridae - isolation & purification
/ Astroviridae Infections - veterinary
/ Astroviridae Infections - virology
/ Avastrovirus - classification
/ Avastrovirus - isolation & purification
/ Biomedical and Life Sciences
/ China
/ High-Throughput Nucleotide Sequencing
/ Identification and classification
/ mammals
/ reverse transcriptase polymerase chain reaction
/ Virology
