Prevalence and phylogenetic analysis of Gyrovirus galga 1 in southern China from 2020 to 2022
文献类型： 外文期刊
作者： Zhang, Fanfan 1 ; Xie, Quan 2 ; Yang, Qun 1 ; Luo, Yangyang 3 ; Wan, Peiwei 4 ; Wu, Chengcheng 1 ; Tu, Lingyun 5 ; Chen, Jiajia 4 ; Kang, Zhaofeng 1 ;
作者机构： 1.Jiangxi Acad Agr Sci, Inst Anim Husb & Vet Med, Nanchang 330200, Jiangxi, Peoples R China
2.Yangzhou Univ, Coll Vet Med, Key Lab Jiangsu Prevent Vet Med, Key Lab Avian Prevent Med,Minist Educ, Yangzhou 225009, Jiangsu, Peoples R China
3.Wens Foodstuff Grp Co Ltd, Wens Grp Res Inst, Yunfu 527400, Guangdong, Peoples R China
4.Jiangxi Biol Vocat Coll, Nanchang 330200, Jiangxi, Peoples R China
5.Nanchang Anim Dis Control Ctr, Nanchang 330008, Jiangxi, Peoples R China
关键词： Gyrovirus galga 1; prevalence; complete genome; genetic divergence; southern China
期刊名称：POULTRY SCIENCE （ 影响因子：4.4； 五年影响因子：4.4 ）
ISSN： 0032-5791
年卷期： 2024 年 103 卷 3 期
页码：
收录情况： SCI
摘要： Since 2011, the Gyrovirus galga 1 (GyVg1, previously recognized as avian gyrovirus 2) strain has extensively been detected worldwide. However, because there are no up-to-date reports of examining the distribution of GyVg1 in flocks in southern China, the epidemiology of this virus is unknown. To investigate the prevalence and genetic evolution of GyVg1, a total of 2,077 field samples collected from 113 chicken farms in 6 provinces in southern China during 2020 to 2022 were tested. Among them, 315 samples (315/2,077, 15.17%) were positive for GyVg1 by PCR. The positive rate of GyVg1 detection between different regions of southern China ranged from 11.69% (Guangdong) to 22.46% (Yunnan). The correlation between GyVg1 prevalence and sample source groups was analyzed, the results showing that the highest seroprevalence of GyVg1 was observed in visceral tissues (27.34%, 187/684), significantly higher (P < 0.05) than that of feather shafts (17.22%, 31/180), serums (8.85%, 78/881), and fecal (5.72%, 19/332). Additionally, the complete genomes of 10 GyVg1 strains were sequenced and analyzed, which showed nucleotide identities of 96.2 to 99.9%, 97.0 to 100.0%, 95.2 to 100.0%, and 95.7 to 99.8% in the complete genome, ORF1, ORF2, and ORF3, respectively, and 94.4 to 100.0%, 91.3 to 100.0%, and 98.7 to 100.0% amino acid similarity in the VP2, VP3, and VP1 proteins, respectively. Phylogenetic analysis of the whole genome showed that 10 GyVg1 strains belong to genotype I, and one strain belongs to genotype III. Sequence analysis showed several amino acid substitutions in both the VP1, VP2, and VP3 proteins. Our results enhance the understanding of the molecular characterization of GyVg1 infection in southern China. In conclusion, this study reveals the high prevalence and high genetic differentiation of GyVg1 in Chinese chickens and suggests that the potential impact of GyVg1 on the chicken industry may be of concern.
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