A Viral Disease in Larvae and Juveniles of the Japanese Flounder Paralichthys olivaceus

Iida, Yasuo; Masumura, Kazuhiko; Nakai, Toshiko; Sorimachi, Minoru; Matsuda, Hirokazu

doi:10.1577/1548-8667(1989)001<0007:avdila>2.3.co;2

Cited by 41 publications

(11 citation statements)

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“…Many herpesviruses have been identified in fishes and the majority have been associated with epithelial proliferations (Wolf 1988, Hedrick & Sano 1989. Some appear to have caused epizootic mortality (Iida et al 1989, McAllister & Herman 1989 and at least one has been associated with, hyperplasia of the branchial epithelium (Watson et al 1995).…”

Section: Blood Gas Analysis Discussionmentioning

confidence: 99%

Epizootic mortality in the pilchard Sardinops sagax neopilchardus in Australia and New Zealand in 1995. I. Pathology and epizootiology

Rj¹,

Jones²,

Pm³

et al. 1997

Dis. Aquat. Org.

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A large-scale eplzootic occurred In the Austialas~an pllchard S a r d~n o p s sagax neop~l c h a r d u s between March and September 1995 ovei more than 5000 km of the Australian coastline and 500 km of the New Zealand coastline Affected fish died wlthln a tew mlnutes of cl~nical slgns of respiratory distress and death was associated wlth hypoxaemla a n d hypercapnea Significant leslons were confined to the gllls and comprised acute to subacute inflammation followed by blzal re epithelia1 hypertrophy and hyperplasia The lesions were initially focal but progressed to become generalised over about 4 d Pathological changes in atfeded fish from xvestern Australia eastern Australia a n d New Zealand were simila~, suggesting a common aetiology The lesions were unllke those associated w~t h ichthyotoxic algae, s~l~c e o u s algae, phys~cochemical factors fungi, bacterla dinoflagellates, amoebde, other protozoa and inetazoa A herpesvlrus was consistently present In gills of affected flsh and absent from unaffected pilchards and IS proposed as the aetiological agent T h e late of spread of the mortal~ty front (approulmately 30 km d ' ) In relation to the migration late of pilchaids a n d plevaillng currents suggests that a vector was involved The dlsease may have been newly introduced lnto Australian wateis KEY WORDS Clupeoldel . Pllchard . Sardinops sagax neopilchardus . Gill dlseases . Pathology .

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Section: Blood Gas Analysis Discussionmentioning

confidence: 99%

Epizootic mortality in the pilchard Sardinops sagax neopilchardus in Australia and New Zealand in 1995. I. Pathology and epizootiology

Rj¹,

Jones²,

Pm³

et al. 1997

Dis. Aquat. Org.

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“…(2) weakly virulent viruses causing chronic systemic infections without specific involvement of the integument: Salmonid herpesvirus 1 (Eaton et al 1989 (Hedrick et al 1991), white sturgeon herpesvirus 2 (Watson et al 1995), Salmonid herpesvirus 2 (Kimura, Yoshimizu 1989), carp pox herpesvirus (Sano et al 1990), koi herpesvirus (Hedrick et al 2000), epizootic epitheliotropic disease virus of lake trout Salvelinus namaycush (Bradley et al 1989, McAllister & Herman 1989, herpesvirus of Japanese flounder Paralichthys olivaceus (Iida et al 1989), herpesvirus of angelfish Pterophyllum altum (Mellergaard & Bloch 1988), herpesvirus of blue-eyed plecostomus Panaque suttoni (Yanong 1995), and other viruses; (4) weakly virulent viruses causing or associated with mild to benign conditions accompanied by the abovementioned integumentary manifestations: walleye Stizostedion vitreum vitreum diffuse epidermal hyperplasia herpesvirus (Kelly et al 1983), spawning papillomatosis herpesvirus of European smelt Osmerus eperlanus (Anders & Möller 1985), Atlantic salmon Salmo salar papillomatosis herpesvirus (Shchelkunov et al 1992), northern pike Esox lucius herpesvirus (Yamamoto et al 1984), sheatfish Silurus glanis herpesvirus (Békési et al 1984), European eel Anguilla anguilla herpesvirus (Békési et al 1986), Anguillid herpesvirus 1 (Hangalapura et al 2007), and other viruses.…”

Section: Discussionmentioning

confidence: 99%

First detection of a viral agent causing disease in farmed sturgeon in Russia

Shchelkunov

Shchelkunova²,

Shchelkunov³

et al. 2009

Dis. Aquat. Org.

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A virus was isolated from Siberian sturgeon Acipenser baeri and bester (beluga Huso huso × sterlet A. ruthenus hybrid) fingerlings in SSO-2, SSF-2 and WSSK-1 cell lines during an acute epizootic on a large fish farm producing fertilised sturgeon eggs and fry. Transmission electron microscopic examination of samples from both inoculated cell cultures and skin of affected fish revealed viral particles with a herpesvirus-like morphology. The etiological role of the Siberian sturgeon herpesvirus (SbSHV) was confirmed by fulfilment of Rivers' postulates. Experimental immersion of healthy Siberian sturgeon fingerlings in a suspension of SbSHV resulted in 100% mortality with signs of focal epidermal hyperplasia, skin necrosis and multiple skin haemorrhages. While infecting different organs and tissues, the virus showed clear integumentary tropism. Carp fry and rainbow trout fingerlings were neither susceptible to the virus nor did they transmit it to healthy Siberian sturgeon. KEY WORDS: Siberian sturgeon. Herpesvirus . Pathogenicity Resale or republication not permitted without written consent of the publisherDis Aquat Org 86: 193-203, 2009 In the spring of 2006, an acute disease outbreak occurred in a large warm water sturgeon hatchery situated in Tver Province in the European part of Russia. The outbreak resulted in a mass mortality of fry and fingerlings, with Siberian sturgeon Acipenser baeri being the most susceptible fish among several sturgeon species cultured there. Up to 100% mortality was registered in some fish lots.The disease developed at a water temperature range of 14 to 19°C. Affected fish were lethargic, consumed no food, had a lighter colour than normal and remained at the rearing tank bottom. Multiple haemorrhages on the ventral part of the rostrum, around the mouth and on the abdominal and lateral body surfaces were the most prominent clinical signs. In moribund fish, the liver was extremely pale, almost white. Saprolegnia sp. and myxobacteria were also found in the skin and gill tissues of many of the diseased fish. However, treatments against these secondary invaders did not result in substantial improvement of fish condition. After parasites and bacteria were excluded as possible causes of the disease, affected tissues from diseased fish were sampled for virological examination. MATERIALS AND METHODSVirus isolation. For virological examinations, samples of affected mouth and gill tissues were collected from 17 fingerling Lena sturgeons (a race of Siberian sturgeon) aged 1.5 to 4 mo old, and from 2 fingerling 3 mo old besters (great sturgeon Huso huso × sterlet Acipenser ruthenus hybrids) each with a body weight between 3 and 25 g. The collected samples were pooled from 2 to 7 fish and transported to the laboratory in chilled (2 to 4°C) condition in Eagle's minimal essential medium (MEM) supplemented with 10% foetal calf serum (FCS; Life Technologies), penicillin (300 I.U. ml -1 ) and streptomycin (300 µg ml -1 ). The time interval between sampling the fish tissues and their pr...

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“…Infection was carried out by the method of Iida et al (1989). Spontaneously FHV-infected fish preserved at -80∞C were homogenized with 99 volumes of Hanks' balanced salt solution (HBSS).…”

Section: Preparation Of Virus-infected and Uninfected Fishmentioning

confidence: 99%

Dysfunction in Respiration and Osmotic Regulation of Larval Japanese Flounder Affected by Viral Epidermal Hyperplasia

Iida¹,

Hiroi

Namba

et al. 2008

Fish Pathol.

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ABSTRACT-Flounder herpesvirus (FHV) induces epidermal hyperplasia in larval Japanese flounder Paralichthys olivaceus. We examined the influence of ambient oxygen and salinity concentrations on mortality of flounder larvae by FHV infection. FHV-infected fish showed markedly higher mortality than uninfected fish under normoxia (partial oxygen pressure; PO 2 = ca. 160 Torr), but survived at high rates under hyperoxia (P O 2 = ca. 280 Torr or higher) as in uninfected fish. In the P O 2 range from 100 to 400 Torr, infected fish always displayed lower levels of oxygen consumption (Ṁ O 2 ) compared to the uninfected fish. Under PO 2 of 260 Torr, the 48 h-survival rate of infected fish in diluted seawater (salinity 8 or 16 ppt) was much higher than that in full-strength seawater (salinity 32 ppt). Whole-mount immunocytochemistry to detect Na + /K + -ATPase and Na + /K + /2Cl -cotransporter of the skin of both infected and uninfected larvae revealed that the infected larvae had a significantly lower number of chloride cells. These results suggest that flounder larvae infected with FHV die of dysfunction in respiration and osmotic regulation.

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A Viral Disease in Larvae and Juveniles of the Japanese Flounder Paralichthys olivaceus

Cited by 41 publications

References 0 publications

Epizootic mortality in the pilchard Sardinops sagax neopilchardus in Australia and New Zealand in 1995. I. Pathology and epizootiology

Epizootic mortality in the pilchard Sardinops sagax neopilchardus in Australia and New Zealand in 1995. I. Pathology and epizootiology

First detection of a viral agent causing disease in farmed sturgeon in Russia

Dysfunction in Respiration and Osmotic Regulation of Larval Japanese Flounder Affected by Viral Epidermal Hyperplasia

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