Pathogenicity of the Nodavirus Detected from Diseased Sevenband Grouper Epinephelus septemfasciatus

魚病研究 Volume 33 Issue 1 Page 31-36 published_at 1998-03
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Title ( eng )
Pathogenicity of the Nodavirus Detected from Diseased Sevenband Grouper Epinephelus septemfasciatus
Creator
Aoki Hideo
Source Title
魚病研究
Fish Pathology
Volume 33
Issue 1
Start Page 31
End Page 36
Abstract
Viral nervous necrosis (VNN) of sevenband grouper Epinephelus septemfasciatus at grow-out stages, which was characterized by upside down swimming or floating behavior, has been spreading in Japan. The present study describes pathogenicity of a nodavirus found in diseased sevenband grouper. When young sevenband grouper or juvenile redspotted grouper E. akaara were challenged by an intramuscular injection with the filtered homogenate of infected organs (brain and eye), abnormal swimming behavior and mortality were produced, but some affected fish recovered from the disease after exhibiting the characterized behavior. Necrosis and vacuolation of the brain and retinal tissues, characteristic to VNN, were produced in the dead and abnormally-swimming fish and the viral antigens were detected in the degenerated nerve cells by FAT with an anti-SJNNV (striped jack nervous necrosis virus) serum. The infection experiment with redspotted grouper also indicated that rearing water temperature (16-28°C) influenced development of the disease: higher mortality and earlier appearance of the disease signs were observed at higher water temperatures.
Keywords
nodavirus
viral nervous necrosis
VNN
sevenband grouper
Epinephelus septemfasciatus
pathogenicity
NDC
Fishing industry. Fisheries [ 660 ]
Language
eng
Resource Type journal article
Publisher
日本魚病学会
Date of Issued 1998-03
Publish Type Version of Record
Access Rights open access
Source Identifier
[ISSN] 0388-788X
[NCID] AN00063165