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Oyster herpes-type virus.

C A Farley, W G Banfield, G Kasnic

    Science (New York, N.Y.)
    |November 17, 1972
    PubMed
    Summary
    This summary is machine-generated.

    A herpes-type virus was discovered in oysters (Crassostrea virginica), marking the first instance in an invertebrate. Higher water temperatures increased viral infections and caused lethal disease in oysters.

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    Area of Science:

    • Marine biology
    • Invertebrate pathology
    • Virology

    Background:

    • Herpes-type viruses are known pathogens in vertebrates.
    • Oysters, such as Crassostrea virginica, are ecologically and economically important marine bivalves.
    • Understanding viral diseases in oysters is crucial for aquaculture and ecosystem health.

    Purpose of the Study:

    • To report the first identification of a herpes-type virus infection in an invertebrate host.
    • To investigate the prevalence of this viral infection in oysters at different water temperatures.
    • To determine the association between the virus and oyster mortality.

    Main Methods:

    • Microscopic examination of oyster tissues for viral inclusions.
    • Comparison of viral inclusion prevalence at ambient (18–20°C) versus elevated (28–30°C) water temperatures.

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  • Correlation of viral presence with observed disease and mortality rates.

    • Main Results:

    • A herpes-type virus infection was identified in the oyster Crassostrea virginica.
    • Intranuclear viral inclusions were significantly more prevalent in oysters exposed to elevated water temperatures (28–30°C).
    • The presence of these viral inclusions was associated with a lethal disease in oysters at higher temperatures.

    Conclusions:

    • This study documents the first herpes-type virus identified in an invertebrate.
    • Elevated water temperatures exacerbate herpes-type viral infections in oysters, leading to significant mortality.
    • The findings highlight the potential impact of climate change on marine invertebrate diseases.