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Early or Simultaneous Infection with Infectious Pancreatic Necrosis Virus Inhibits Infectious Hematopoietic Necrosis Virus Replication and Induces a Stronger Antiviral Response during Co-infection in Rainbow Trout (Oncorhynchus mykiss)

文献类型: 外文期刊

作者: Shao, Yizhi 1 ; Zhao, Jingzhuang 1 ; Ren, Guangming 1 ; Lu, Tongyan 1 ; Chen, Xiaoyu 2 ; Xu, Liming 1 ;

作者机构: 1.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Dept Aquat Anim Dis & Control, Key Lab Aquat Anim Dis & Immune Technol Heilongji, Harbin 150070, Peoples R China

2.Technol Ctr Wuhan Customs, Wuhan 430050, Peoples R China

关键词: rainbow trout; co-infection; infectious hematopoietic necrosis virus (IHNV); infectious pancreatic necrosis virus (IPNV); antagonistic effect

期刊名称:VIRUSES-BASEL ( 影响因子:5.818; 五年影响因子:5.811 )

ISSN:

年卷期: 2022 年 14 卷 8 期

页码:

收录情况: SCI

摘要: Infectious hematopoietic necrosis (IHN) and infectious pancreatic necrosis (IPN) are the most common viral diseases of salmon in aquaculture worldwide. The co-infection of rainbow trout (Oncorhynchus mykiss) with IHN virus (IHNV) and IPN virus (IPNV) is known to occur. To determine the influence of IPNV on IHNV in co-infection, rainbow trout were intraperitoneally (i.p.) injected with IPNV at different time intervals prior to, simultaneously to, or after IHNV infection. The replication of IHNV in the brain, gill, heart, liver, spleen, and head kidney was detected by real-time quantitative polymerase chain reaction (qRT-PCR). The results showed that when rainbow trout were i.p. injected with IPNV prior to, simultaneously to, or after IHNV on 2 day (d), IHNV replication was inhibited (p < 0.05) in all collected tissues. Nevertheless, when rainbow trout were i.p. injected with IPNV after IHNV on 7 d (H7P), IHNV replication was only inhibited (p < 0.05) in the liver 14 d post-IHNV infection. Moreover, stronger antiviral responses occurred in all challenge groups. Our results suggest that IPNV can inhibit IHNV replication before or simultaneously with IHNV infection, and induce a stronger antiviral response, and that this inhibition is most sensitive in the liver. Early i.p. injection of IPNV can significantly reduce the mortality of rainbow trout, compared with the group only injected with IHNV.

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