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  • 1
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Epidermal hyperplasia consisting of discrete translucent raised outgrowths of cells were observed on the skin of walleye, Stizostedion vitreum vitreum (Mitchill), during their spawning period in the spring. The cells constituting the hyperplastic growths were limited to the epidermal layer, and were associated with surface budded, 120-nm-diameter, retrovirus-like particles located in the expanded intercellular spaces. These tumour-like growths were distinct from the other virus-associated skin lesions of walleye including dermal sarcoma, lymphocystis disease and herpesvirus-associated hyperplasia. Lesions could be differentiated by careful observation in the field and comparison of portions of each growth by histologic and electron microscopic observations.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Abstract. A new virus, provisionally named Herpesvirus vitreum, was isolated from hyperplastic epidermal tissue from a walleye, Stizostedion vitreum vitreum (Mitchill), taken in Saskatchewan, Canada. The virus, which was isolated in the walleye ovarian (WO) cell line, was identified as a herpesvirus on the basis of size (190–230 nm), morphology and apparent pattern of replication. The virus, which passes polycarbonate membranes of 200 nm mean pore diameter, was ether-labile. Virus replicated in WC-1 cells at 4 and 15°C, but not at 20°C. Although walleye cell lines (WO, WC-1, We-2) were susceptible to infection at 15°C, non-period cell lines were refractory. Syncytial formation and lysis occurred in susceptible cell lines. Virus was quantified by plaque assay at 13 to 15°C for two weeks. Replication was inhibited by 10-3.0m phosphonoacetate and by 10-5.0m 5-bromodeoxyuridine (BUDR), but addition of excess thymidine reversed the inhibition by BUDR. Viral replication in WO cells, but not in WC-1 cells, was inhibited by the antiherpetic drug acyclovir (10-5.0m). The relationship of the herpesvirus isolate and epithelial neoplasms was not determined.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Archives of virology 48 (1975), S. 279-287 
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The initial steps in the DNA-transfer, or transfection, method of virus rescue were characterized using primary green monkey kidney (GMK) cells exposed to SV 40-transformed mouse (SV-3T3) cell DNA in the presence of 1 mg/ml DEAE-dextran. When large amounts (10–50 µg) of high molecular weight DNA (〉107 daltons) were inoculated onto 106 GMK cells, usually less than 1 µg became cell-associated. DNA fragmented to a size of 1–3×106 daltons was bound more efficiently by the recipient cells, but generally only 5–10 per cent of the inoculum (representing 1–4 µg) was taken up. Approximately 50 per cent of the cell-associated DNA had penetrated to a DNase-resistant state by the end of the 30-minute incubation period. The effect of the size of the transformed cell DNA molecule on the recovery of SV40 in transfection experiments was investigated. The trend appeared to be that rescue was more efficient with the larger molecular weight samples.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Archives of virology 79 (1984), S. 255-272 
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Northern pike from several locations in central Canada were observed to have two different types of hyperplastic epidermal lesions on the body and fins. One type of epidermal hyperplasia consisted of flat lesions, bluish-white in color with a granular or “gritty” appearance. Histological examination of this granular lesion showed the presence of grossly hypertrophied cells surrounded by normal sized epidermal cells. The enlarged nuclei in thin section contained many typical herpesvirus capsids measuring 100 nm in diameter. A large proportion of the cytoplasmic mass consisted of many dark staining inclusions in which were embedded numerous herpes-like virions. For this herpesvirus of pike the name esocid herpesvirus 1 is proposed in keeping with the herpesvirus nomenclature ofRoizman et al. (19). The second type of epidermal hyperplasia was a smooth convex whitish translucent tissue mass consisting largely of a population of randomly oriented normal sized undifferentiated cells. Electron microscopic examination showed them to be associated with clusters of C-type retrovirus measuring 150 nm in diameter. The formation of these virus particles was by budding from the cytoplasmic membrane into the inter-cellular spaces. Neither the herpesvirus nor the C-type particles could be isolated in fish cell cultures.
    Type of Medium: Electronic Resource
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  • 5
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    Columbia Univ. Press
    In:  In: The seismogenic zone of subduction thrust faults. , ed. by Dixon, T. and Moore, J. C. Columbia Univ. Press, New York, pp. 257-287.
    Publication Date: 2012-02-23
    Type: Book chapter , PeerReviewed
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