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Frog virus 3: Prevalence survey and quantitative analysis in American bullfrogs using TaqMan MGB probe real-time fluorescence quantitative PCR

文献类型： 外文期刊

作者： Li, Hua 1 ; Liu, Xiaobing 1 ; Sun, Jingyang 1 ; Lin, Han 1 ; Chen, Kesong 1 ; Hu, Yueming 1 ; Jiang, Mengzhen 1 ; Jiang, Biao 1 ; Li, Wei 1 ; Su, Youlu 1 ; Wang, Qing 2 ; Liu, Chun 1 ;

作者机构： 1.Zhongkai Univ Agr & Engn, Innovat Inst Anim Hlth Breeding, Coll Anim Sci & Technol, Guangzhou Key Lab Aquat Anim Dis & Waterfowl Breed, Guangzhou 510225, Peoples R China

2.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Key Lab Aquat Anim Immune Technol Guangdong Prov, Guangzhou 510380, Peoples R China

3.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Key Lab Fishery Drug Dev, Minist Agr, Guangzhou 510380, Peoples R China

关键词： Aquarana catesbeiana; Frog virus 3; TaqMan-MGB real-time PCR; Virus load; Prevalence survey

期刊名称：AQUACULTURE （ 影响因子：3.9； 五年影响因子：4.4 ）

ISSN： 0044-8486

年卷期： 2025 年 605 卷

页码：

收录情况： SCI

摘要： The American bullfrog (Aquarana catesbeiana) has emerged as a significant aquaculture species in China. A substantial rise in breeding density can deteriorate its breeding environment, increasing its susceptibility to diseases. Frog Virus 3(FV3) is an important pathogen of the bullfrog that can result in hemorrhage and necrosis of tissues after infection. However, our understanding of the prevalence and pathogenesis of FV3 in farmed bullfrogs remains limited. This study aimed to analyze the changes in viral load within the organs of infected bullfrogs and to investigate the prevalence of FV3 infection across various bullfrog farms, thereby providing insights into the pathogenic mechanisms of FV3. A rapid, specific, and highly sensitive a TaqMan minor groove binder probe fluorescence real-time quantitative polymerase chain reaction (qPCR) assay was developed for detection and quantification of FV3. The established qPCR method was used to study the distribution of FV3 in bullfrog tissues. It was found that FV3 could result in asymptomatic long-term persistence in tissues following infection in bullfrogs, with the liver being the primary site of replication. Furthermore, the prevalence of FV3 in bullfrog farms in Guangdong Province, a major bullfrog farming area in China, was surveyed, and it was found that the detection rate in diseased bullfrogs was 39.5 %. This study will provide effective tools for the early diagnosis and monitoring of FV3 infections, as well as provide foundational data essential for the prevention and control of the disease in bullfrog aquaculture.

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