The national surveillance study of grass carp reovirus in China reveals the spatial-temporal characteristics and potential risks
文献类型： 外文期刊
作者： Feng, Yang 1 ; Shi, Cunbin 2 ; Ouyang, Ping 1 ; Huang, Xiaoli 3 ; Chen, Defang 3 ; Wang, Qing 2 ; Yin, Jiyuan 2 ; Zhang, Defeng 2 ; Geng, Yi 1 ;
作者机构： 1.Sichuan Agr Univ, Coll Vet Med, Wenjiang 611130, Sichuan, Peoples R China
2.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Guangdong Prov Key Lab Aquat Anim Immune Technol, Key Lab Fishery Drug Dev,Minist Agr & Rural Areas, Guangzhou 510380, Peoples R China
3.Sichuan Agr Univ, Coll Anim Sci & Technol, Dept Aquaculture, Wenjiang 611130, Sichuan, Peoples R China
关键词： Grass carp Reovirus (GCRV); Surveillance study; Epidemic characteristics; Risk factors; Grass carp (Ctenopharyngodon idella)
期刊名称：AQUACULTURE （ 影响因子：5.135； 五年影响因子：5.125 ）
ISSN： 0044-8486
年卷期： 2022 年 547 卷
页码：
收录情况： SCI
摘要： Grass Carp Reovirus (GCRV) causes serious hemorrhagic disease in fingerling and yearling grass carp and is listed as a Class II animal disease by the Ministry of Agriculture and Rural Affairs of China. To clarify the epidemic characteristics of GCRV in China, this study monitored grass carp hemorrhagic disease in China from 2017 to 2020. A total of 108 farms were positive for GCRV, accounting for 10.2% of the monitored farms. Guangxi, Guangdong, Tianjin, Hubei, and Jilin Provinces were the highest GCRV-positive regions, which accounted for 39.8% of China's grass carp production. The GCRV positive rate was not consistent during 2017-2020, with the highest rate in 2020 and the lowest rate in 2019. GCRV was not detected during every year of the study, except in Guangdong, Guangxi, and Hubei. Moreover, only 17 farms recorded GCRV-positive cases for 2 consecutive years, and farms that introduced fingerlings during the culture period and closed the cultivation grounds had a higher risk of GCRV, suggesting that GCRV is more likely to be transmitted from other farms rather than from previous years. Our results suggest that improved quarantine when fingerlings are introduced may block the continuous transmission of GCRV.
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