Susceptibility of Four Abalone Species, Haliotis gigantea, Haliotis discus discus, Haliotis discus hannai and Haliotis diversicolor, to Abalone asfa-like Virus
| Autor: | Yuta Matsuura, Mari Inada, Tomokazu Takano, Ikunari Kiryu, Takashi Kamaishi, Tomomasa Matsuyama |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
food.ingredient
Abalone Zoology Microbiology Article Animal Diseases Haliotis gigantea abalone asfa-like virus food Virology Haliotis discus Juvenile Animals Haliotis Haliotis diversicolor abalone biology infectivity DNA Viruses Gigantea biology.organism_classification QR1-502 AbALV virulence Infectious Diseases Mollusca Virus Diseases Novel virus Viruses Unclassified mass mortality |
| Zdroj: | Viruses Volume 13 Issue 11 Viruses, Vol 13, Iss 2315, p 2315 (2021) |
| ISSN: | 1999-4915 |
| Popis: | Abalone amyotrophia is a viral disease that causes mass mortality of juvenile Haliotis discus and H. madaka. Although the cause of this disease has yet to be identified, we had previously postulated a novel virus with partial genome sequence similarity to that of African swine fever virus is the causative agent and proposed abalone asfa-like virus (AbALV) as a provisional name. In this study, three species of juvenile abalone (H. gigantea, H. discus discus, and H. diversicolor) and four species of adult abalone (the above three species plus H. discus hannai) were experimentally infected, and their susceptibility to AbALV was investigated by recording mortality, quantitatively determining viral load by PCR, and conducting immunohistological studies. In the infection test using 7-month-old animals, H. gigantea, which was previously reported to be insusceptible to the disease, showed multiplication of the virus to the same extent as in H. discus discus, resulting in mass mortality. H. discus discus at 7 months old showed abnormal cell masses, notches in the edge of the shell and brown pigmentation inside of the shell, which are histopathological and external features of this disease, while H. gigantea did not show any of these characteristics despite suffering high mortality. Adult abalones had low mortality and viral replication in all species however, all three species, except H. diversicolor, became carriers of the virus. In immunohistological observations, cells positive for viral antigens were detected predominantly in the gills of juvenile H. discus discus and H. gigantea, and mass mortality was observed in these species. In H. diversicolor, neither juvenile nor adult mortality from infection occurred, and the AbALV genome was not increased by experimental infection through cohabitation or injection. Our results suggest that H. gigantea, H. discus discus and H. discus hannai are susceptible to AbALV, while H. diversicolor is not. These results confirmed that AbALV is the etiological agent of abalone amyotrophia. |
| Databáze: | OpenAIRE |
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