Comparison of two birnavirus–rhabdovirus coinfections in fish cell lines

Diseases of Aquatic Organisms

M. Alonso¹  S. I. Pérez-Prieto¹  S.¹  Rodriguez¹ 

关键词: Infectious pancreatic necrosis virus;    Infectious hematopoiteic necrosis virus;    Viral hemorrhagic septicemia virus;    Coinfections;    Fish viruses;   

DOI  :  10.3354/dao067183

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: Aquabirnaviruses, such as the infectious pancreatic necrosis virus (IPNV), Novirhabdoviruses, such as the infectious hematopoiteic necrosis virus (IHNV) and the viral hemorrhagic septicemia virus (VHSV), cause considerable losses to the salmonid industry worldwide. Coinfections of 2 viruses have been described, but the interactions between rhabdoviruses and birnaviruses have not been examined closely. Using virus titration, flow cytometry and RT-PCR assays, we compared the effect of IPNV on the replication of IHNV and VHSV in tissue culture cells. RT-PCR assays indicated that simultaneous infection of IPNV with VHSV does not affect the replication of the rhabdovirus either in the first or successive passages; the infective titers were similar in single and double infections. In contrast, coinfection of IPNV with IHNV induced a fall in infectivity, with reduced expression of IHNV viral antigens in BF-2 cells from Lepomis macrochirus and a loss of 4.5 log₁₀ units of the infective titer after 3 successive passages. It was possible to stimulate BF-2 cells to produce significant interferon-like activity against IHNV but not against VHSV.

【 授权许可】

Unknown