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A systemic parvo-like virus in the freshwater crayfish Cherax destructor

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Edgerton, B., Webb, R. and Wingfield, M. (1997) A systemic parvo-like virus in the freshwater crayfish Cherax destructor. Diseases of Aquatic Organisms, 29 (1). pp. 73-78. ISSN 0177-5103


Article Link: https://doi.org/10.3354/dao029073


Systemic Cowdry Type A inclusions (CAs) were observed in a moribund Cherax destructor collected at an aquaculture farm in South Australia. Inclusions were most common in the gills and were associated with multifocal necrosis of the main gill axis and lamellae. The hepatopancreas was necrotic; however, only one CA was observed in the interstitial tissues. CAs were associated with necrosis in the abdominal and gut musculature. CAs were also observed in the spongy connective tissues and the epicardium. Empty capsids (17.5 ± 0.5 nm) and microfilaments were most commonly observed within these inclusions by transmission electron microscopy. Complete icosahedral viral particles (20.8 ± 1.2 nm) were difficult to distinguish within the viroplasm, but were visualised better in aggregates between the viroplasm and the inner nuclear membrane. The nucleolus was closely associated with the developing viroplasm, and was hypertrophied and segregated into its fibrillar and granular components. The virus was named Cherax destructor systemic parvo-like virus (CdSPV) on the basis of its histopathology, cytopathology and morphology. CdSPV is the first systemic virus described in a freshwater crayfish.

Item Type:Article
Keywords:Crayfish, Cherax destructor, Systemic parvo-like virus, Histopathology, Cytopathology
Subjects:Science > Microbiology > Virology
Aquaculture and Fisheries > Aquaculture > Shellfish culture
Live Archive:26 Mar 2024 23:38
Last Modified:26 Mar 2024 23:38

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