NDLI: Isolation and identification of a new strain of nervous necrosis virus from the big-belly seahorse Hippocampus abdominalis

Content Provider	Springer Nature : BioMed Central
Author	Chen, Xinxin Qi, Jianfei He, Libin Luo, Huiyu Lin, Jinbo Qiu, Fengyan Wang, Qing Zheng, Leyun
Abstract	Background Betanodaviruses, members of the Nodaviridae family, are the causative agents of viral nervous necrosis in fish, resulting in great economic losses worldwide. Methods In this study, we isolated a virus strain named seahorse nervous necrosis virus (SHNNV) from cultured big-belly seahorses Hippocampus abdominalis in Xiamen city, Fujian Province, China. Virus isolation, PCR detection, phylogenetic analysis, qRT-PCR, fluorescence in situ hybridization and histology were used for virus identification and analysis of virus histopathology. Furthermore, an artificial infection experiment was conducted for virulence testing. Results Brain and eye tissue homogenates of diseased big-belly seahorses were inoculated onto a grouper spleen (GS) cell monolayer at 28 °C. Tissue homogenates induced obvious cytopathic effects in GS cells. PCR and sequencing analyses revealed that the virus belonged to Betanodavirus and shared high sequence identity with red-spotted grouper nervous necrosis virus isolates. qRT-PCR and fluorescence in situ hybridization revealed that SHNNV mainly attacked the brain and eye. Histopathological examination revealed that the virus led to cytoplasmic vacuolation in the brain and retinal tissues. Infection experiments confirmed that SHNNV was highly infectious, causing massive death in big-belly seahorses. Conclusion A novel seahorse betanodavirus from the big-belly seahorse cultured in China was discovered. This finding will contribute to the development of efficient strategies for disease management in aquaculture.
Related Links	https://virologyj.biomedcentral.com/counter/pdf/10.1186/s12985-022-01837-8.pdf
Ending Page	9
Page Count	9
Starting Page	1
File Format	HTM / HTML
DOI	10.1186/s12985-022-01837-8
Journal	Virology Journal
Issue Number	1
Volume Number	19
Language	English
Publisher	BioMed Central
Publisher Date	2022-06-27
Access Restriction	Open
Subject Keyword	Virology Nervous necrosis virus Big-belly seahorse Identification Pathogenicity
Content Type	Text
Resource Type	Article
Subject	Virology Infectious Diseases
Journal Impact Factor	4/2023
5-Year Journal Impact Factor	3.8/2023

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