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Zhang F, Xie Q, Yang Q, Luo Y, Wan P, Wu C, Tu L, Chen J, Kang Z. Prevalence and phylogenetic analysis of Gyrovirus galga 1 in southern China from 2020 to 2022. Poult Sci 2024; 103:103397. [PMID: 38295496 PMCID: PMC10846400 DOI: 10.1016/j.psj.2023.103397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 12/06/2023] [Accepted: 12/19/2023] [Indexed: 02/02/2024] Open
Abstract
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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Affiliation(s)
- Fanfan Zhang
- Institute of Animal Husbandry and Veterinary Medicine, Jiangxi Academy of Agricultural Sciences, Nanchang, Jiangxi 330200, China
| | - Quan Xie
- Key Laboratory of Jiangsu Preventive Veterinary Medicine, Key Laboratory for Avian Preventive Medicine, Ministry of Education, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Qun Yang
- Institute of Animal Husbandry and Veterinary Medicine, Jiangxi Academy of Agricultural Sciences, Nanchang, Jiangxi 330200, China
| | - Yangyang Luo
- Wen's Foodstuff Group Co., Ltd., Wen's Group Research Institute, YunFu, Guangdong 527400, China
| | - Peiwei Wan
- Jiangxi Biological Vocational College, Nanchang, Jiangxi 330200, China
| | - Chengcheng Wu
- Institute of Animal Husbandry and Veterinary Medicine, Jiangxi Academy of Agricultural Sciences, Nanchang, Jiangxi 330200, China
| | - Lingyun Tu
- Nanchang Animal Disease Control Center, Nanchang, Jiangxi 330008, China
| | - Jiajia Chen
- Jiangxi Biological Vocational College, Nanchang, Jiangxi 330200, China
| | - Zhaofeng Kang
- Institute of Animal Husbandry and Veterinary Medicine, Jiangxi Academy of Agricultural Sciences, Nanchang, Jiangxi 330200, China.
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Zhang S, Yang J, Zhou D, Yan T, Li G, Hao X, Yang Q, Cheng X, Shi H, Liu Q, Li Y, Cheng Z. Development of a DAS-ELISA for Gyrovirus Homsa1 Prevalence Survey in Chickens and Wild Birds in China. Vet Sci 2023; 10:vetsci10050312. [PMID: 37235395 DOI: 10.3390/vetsci10050312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 04/07/2023] [Accepted: 04/21/2023] [Indexed: 05/28/2023] Open
Abstract
Gyrovirus homsa1 (GyH1) is an emerging pathogenic single-stranded circular DNA virus that leads to immunosuppression, aplastic anemia, and multisystem damage in chickens. However, the prevalence of GyH1 infection in chickens and wild birds remains unknown. Here, we developed a double-antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA) to investigate GyH1 infection in 8 chicken species and 25 wild bird species. A total of 2258 serum samples from chickens (n = 2192) in 15 provinces, and wild birds (n = 66) in Jinan Wildlife Hospital were collected from 2017 to 2021 in China. The GyH1-positive rates in chickens and wild birds were 9.3% (203/2192) and 22.7% (15/66), respectively. GyH1 was present in all flocks in 15 provinces. From 2017 to 2021, the positive rate ranged from 7.93% (18/227) to 10.67% (56/525), and the highest positive rate was present in 2019. Upon chicken age, the highest positive rate (25.5%) was present in young chickens (14-35 days old). Moreover, the GyH1-positive rate in broiler breeders (12.6%, 21/167) was significantly higher than that in layer chickens (8.9%, 14/157). This study shows that GyH1 has spread in chicken flocks and wild birds, and the higher GyH1-positive rate in wild birds indicates the risk of spillover from wild birds to chickens. Our study expanded the GyH1 epidemiological aspects and provided a theoretical basis for GyH1 prevention.
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Affiliation(s)
- Shicheng Zhang
- College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Shanghai 200241, China
| | - Jianhao Yang
- College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China
| | - Defang Zhou
- College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China
| | - Tianxing Yan
- College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China
| | - Gen Li
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao 266109, China
| | - Xiaojing Hao
- Qingdao Husbandry and Veterinary Institute, Qingdao 266199, China
| | - Qi Yang
- College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China
| | - Xiangyu Cheng
- College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China
| | - Hengyang Shi
- College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China
| | - Qing Liu
- Zoo Wildlife Hospital, Jinan 250032, China
| | - Yubao Li
- College of Agronomy and Agricultural Engineering, Liaocheng University, Liaocheng 252059, China
| | - Ziqiang Cheng
- College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China
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