中国畜牧兽医 ›› 2026, Vol. 53 ›› Issue (2): 959-972.doi: 10.16431/j.cnki.1671-7236.2026.02.040

• 预防兽医 • 上一篇    下一篇

鸭星状病毒1型信阳株全基因组扩增及遗传进化分析

张敏1,2(), 李迎晓1,2(), 张璐璐1, 何书海1,2, 曲哲会1,2, 秦东升3, 刘纪成1,2, 焦凤超1,2()   

  1. 1.信阳农林学院,信阳 464000
    2.河南省水禽资源开发利用与疫病防控工程技术研究中心,信阳 464000
    3.河南固佳食品股份有限公司,信阳 464000
  • 修回日期:2025-06-11 出版日期:2026-02-20 发布日期:2026-01-27
  • 通讯作者: 李迎晓,焦凤超 E-mail:xyzhangmin629@163.com;liyingxiao81@163.com;fengchaojiao@163.com
  • 作者简介:张敏,E-mail: xyzhangmin629@163.com
  • 基金资助:
    信阳市创新应用专项(20200016);信阳农林学院科技服务团队项目(2022FWTD);信阳农林学院青年教师科研基金项目(QN2023019);信阳农林学院科技创新团队资助项目(KJCXTD-201901)

Whole Genome Amplification and Phylogenetic Analysis of Duck Astrovirus Type 1 Xinyang Strain

ZHANG Min1,2(), LI Yingxiao1,2(), ZHANG Lulu1, HE Shuhai1,2, QU Zhehui1,2, QIN Dongsheng3, LIU Jicheng1,2, JIAO Fengchao1,2()   

  1. 1.Xinyang Agricultural and Forestry University,Xinyang 464000,China
    2.Engineering Technology Research Center for Waterfowl Resources Development and Utilization and Epidemic Disease Prevention and Control of Henan Province,Xinyang 464000,China
    3.Henan Gujia Food Co. ,Ltd. ,Xinyang 464000,China
  • Revised:2025-06-11 Online:2026-02-20 Published:2026-01-27
  • Contact: LI Yingxiao, JIAO Fengchao E-mail:xyzhangmin629@163.com;liyingxiao81@163.com;fengchaojiao@163.com

摘要:

目的 了解信阳地区鸭星状病毒1型(Duck astrovirus type 1, DAstV1)流行株基因组的演化特征,为进一步研究信阳地区DAstV1的流行、遗传进化及致病特性提供参考依据。 方法 对某养殖场送检的病鸭进行禽腺病毒、禽星状病毒和鸭甲型肝炎病毒等12种常见病毒的PCR/RT-PCR筛查。采集病鸭肝脏组织,无菌处理后经卵黄囊途径接种10日龄SPF鸭胚,连续传代4次,并逐代收集尿囊液进行DAstV RT-PCR鉴定。对分离到的病毒进行全基因组测序,并对ORF1a、ORF1b和ORF2基因序列及其编码蛋白的氨基酸变异位点进行比对分析。 结果 送检病料筛查结果显示,禽星状病毒呈阳性。第1~4代鸭胚尿囊液中均呈DAstV1阳性,将该病毒命名为HN24XY06。第4代接种鸭胚全部死亡,死亡胚体发育不良且体表出血。HN24XY06基因组全长7 755 nt,包含ORF1a、ORF1b和ORF2 3个开放阅读框。序列比对和系统发育分析表明,HN24XY06属于DAstV1毒株,与山东分离株DAstV-SDZZ和DAstV-SDWF亲缘关系较近。ORF1a、ORF1b和ORF2蛋白的氨基酸序列分析显示,存在不同程度的突变,多发生在ORF1a编码的氨基酸序列中。 结论 本研究分离到了1株DAstV1,丰富了信阳地区DAstV1的分子流行病学资料,并为进一步研究DAstV1的致病机制奠定了基础。

关键词: 鸭星状病毒1型(DAstV1); 病毒分离与鉴定; 全基因组扩增; 遗传进化分析

Abstract:

Objective This study aimed to investigate the evolution characteristics of complete genome of Duck astrovirus type 1 (DAstV1) in Xinyang region,and provide a genomic reference for future studies on its epidemiology, genetic evolution,and pathogenicity. Method Clinical samples from diseased ducks submitted by a commercial farm were screened by PCR/RT-PCR for twelve common avian viruses, including Fowl adenovirus, Avian astrovirus and Duck hepatitis A virus. Liver tissues were collected, sterilized, and inoculated into 10-day-old SPF duck embryos via the yolk-sac route, and passaged four times. Allantoic fluid from each passage was tested for DAstV by RT-PCR. The isolated virus was subjected to whole genome sequencing, and the nucleotide sequences of the ORF1aORF1b and ORF2 genes, as well as the amino acid variation sites of their encoded proteins, were analyzed and compared. Result Avian astrovirus was detected in the clinical samples. DAstV1 was consistently positive in allantoic fluids from the 1st to 4th passage duck embryos. The isolate was designated HN24XY06. All fourth-passage embryos died following inoculation, exhibiting poor development and subcutaneous hemorrhage. The genome of HN24XY06 was 7 755 nt in length and contained three open reading frames: ORF1a, ORF1b, and ORF2. Sequence alignment and phylogenetic analysis showed that HN24XY06 belonged to DAstV1 strain and was closely related to the Shandong isolates DAstV-SDZZ and DAstV-SDWF. Sequence analysis of the amino acid sites of the ORF1a, ORF1b and ORF2 proteins showed that these proteins had mutations to varying degrees, mainly in the amino acid sequence encoded by ORF1a. Conclusion A strain of DAstV1 was successfully isolated in this study, thereby enriching the molecular epidemiological data of DAstV1 in Xinyang region and providing a solid foundation for further investigations into its pathogenic mechanisms.

Key words: Duck astrovirus type 1 (DAstV1); virus isolation and identification; whole genome amplification; phylogenetic analysis

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