Viral Diseases of Cultured Fishes in Japan

Sano, Tokuo

doi:10.3147/jsfp.10.221

Cited by 136 publications

(93 citation statements)

References 5 publications

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“…It had been reported (Sano 1976, Cattric & Chastel 1980, Bucke 1981, Okamoto et al 1983, Chi et al 1991 that birnavirus groups related to Ab and Sp serotypes of IPNV were isolated from European eels which might not have encountered salmonid fishes infected with IPNV, but any pathological effects were unclear because of a lack of histological examinations in these previous studies. In the present study, a birnavirus of PCNV was isolated from Japanese eels that had never encountered salmonid fishes or European eels in Japan, and was revealed to be more closely related antigenically to the Sp rather than to the Ab serotype.…”

Section: Discussionmentioning

confidence: 93%

“…Subsequently, birnaviruses were found all over the world in other fishes such as eels, yellowtail, turbot, goby, and shellfishes (Sano 1976, Adair & Ferguson 1981, Hudson et al 1981, Sorimachi & Egusa 1982, Hedrick et al 1985, 1986, Sorimach & Hara 1985, Lo et al 1988, Wattanavijan et al 1988, Lipipun et al 1989, Nova et al 1993, Suzuki et al 1998a. The serological relationships between IPNV and other aquatic birnaviruses were studied using cross-neutralization tests with polyclonal and monoclonal antibodies, which resulted in the establishment of 2 or 3 serogroups (Hill & Way 1988, Wolf 1988, Caswell-Reno et al 1989, Kusuda et al 1993.…”

Section: Introductionmentioning

confidence: 99%

“…There have been reports of birnaviruses isolated from European eels Anguilla anguilla, and the isolates were classified as Ab and Sp serotypes of IPNV (Sano 1976, Cattric & Chaste1 1980, Bucke 1981, Okanloto et al 1983) by neutralization tests with IPNV reference antisera. In previous studies, these birnaviruses were recognized to be either non-pathogenic or weakly pathogenic to eels although they were isolated from eels.…”

Section: Introductionmentioning

confidence: 99%

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Gill lamellar pillar cell necrosis, a new birnavirus disease in Japanese eels

Lee

Nomura²,

Miyazaki³

1999

Dis. Aquat. Org.

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Since the late 1980s, a birnaviral gill disease has been occurring in Japanese eels Anguilla japonica reared in warmwater ponds in western regions in Japan. Diseased eels mostly displayed marked formations of aneurysmal hematomas within gill lamellae and high mortalities. Histological examination revealed necrosis of pillar cells and subsequent aggregation of erythrocytes inside the lamellar capillaries, and proliferation of interlamellar epithelia onto the lamellae. Gastric gland cells were also necrotized. Electron microscopy revealed birnavirus infection in lamellar pillar cells. The causative birnavirus was isolated and cultured in fish cell lines and was found to be related to an infectious pancreatic necrosis virus (IPNV) Sp serotype by neutralization tests. The viral pathogenicity was confirmed by the results of histopathological examinations and infectivity experiments.

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Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Gill lamellar pillar cell necrosis, a new birnavirus disease in Japanese eels

Lee

Nomura²,

Miyazaki³

1999

Dis. Aquat. Org.

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“…The virus is widely distributed in the northern part of Japan and causes mass mortality and/or basal cell tumor (Sano, 1976;Kimura et al, 1981;Yoshimizu et al, 1989;Kumagai et al, 199 4a).…”

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confidence: 99%

Infection Source of Herpesvirus Disease in Coho Salmon Culture and its Control.

Kumagai¹,

Takahashi²,

Fukuda³

1997

Fish Pathol.

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Epizootiological surveys on salmonid herpesvirus-2 (SaHV-2) infection in coho salmon (Oncorhynchus kisutch) culture were undertaken at freshwater hatcheries and seawater farms in order to clarify the infection source. At seawater farms, the outbreaks were observed only in the fish populations derived from particular hatcheries, and in some cases, the disease was observed during the seawater acclimatization period. Outbreaks during mariculture period tended to occur repeatedly year after year when the seedlings were introduced from hatcheries where coho salmon was reared together with other salmonids. On the other hand, in fish derived from hatcheries where only coho salmon was reared, the outbreak occurred only when the hatchery replenished the juveniles from virally contaminated hatcheries. In the surveillance of virus carrier fish, SaHV-2 highly virulent to coho salmon was isolated from apparently normal rainbow trout collected at a hatchery, where coho salmon seedlings supplied every year had been found to be contaminated. These results suggest that the SaHV-2 infection to coho salmon occurred at freshwater hatcheries and that the transportation of infected juveniles spread the virus among the hatcheries. It was also suggested that the infection source might be asymptomatically infected other salmonid species which were reared together with coho salmon.

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“…These viruses include channel catfish virus (CCV) (Wolf and Darlington, 1971), Herpesvirus sal monis (Wolf et al, 1978), NeVTA (nerka virus of Towada Lake, Akita and Aomori) (Sano, 1976), Oncorhynchus masou virus (OMV) (Kimura et al, 1981), yamame tumor virus (Sano et al, 1983), Herpesvirus vitreum (walleye herpesvirus) (Kelly et al, 1983), Herpesvirus cyprini (Sano et al, 1985) and Herpesvirus anguillae (Sano et al, 1990). Among these viruses, CCV, NeVTA, YTV, OMV and CHV were experi mentally demonstrated to be able to produce high mortality rate among inoculated fish.…”

mentioning

confidence: 99%