Description of spatiotemporal patterns of infectious salmon anemia virus (ISAV) detections in marine Atlantic Salmon farms in Newfoundland and Labrador
© 2023 The Authors. Journal of Aquatic Animal Health published by Wiley Periodicals LLC on behalf of American Fisheries Society.
| Veröffentlicht in: | Journal of aquatic animal health. - 1998. - 35(2023), 4 vom: 20. Dez., Seite 296-307 |
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| Weitere Verfasser: | , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2023
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| Zugriff auf das übergeordnete Werk: | Journal of aquatic animal health |
| Schlagworte: | Journal Article Atlantic Salmon Canada HPR0 HPRΔ ISAV Newfoundland and Labrador detection infectious salmon anemia prevalence |
| Zusammenfassung: | © 2023 The Authors. Journal of Aquatic Animal Health published by Wiley Periodicals LLC on behalf of American Fisheries Society. OBJECTIVE: The objectives of this study were to describe spatiotemporal patterns of infectious salmon anemia virus (ISAV) detections in marine salmonid production sites in the province of Newfoundland and Labrador in Canada METHODS: Infectious salmon anemia virus surveillance data between 2012 and 2020 from the province of Newfoundland and Labrador were used. Data comprised a total of 94 sampling events from 20 Atlantic Salmon Salmo salar production sites in which ISAV was detected. Using linear regression models, factors influencing time to detection (days from stocking to first ISAV detection) and time to depopulation (days from first detection to production site depopulation) were investigated RESULT: Based on 28 unique cases, site-level annual incidence risk of ISAV detection ranged from 3% to 29%. The proportion of ISAV detection by PCR in fish samples ranged from 2% to 45% annually. Overall, ISAV variants from the European clade were more common than variants from the North American clade. The type of ISAV clade, detections of ISAV in nearest production sites based on seaway distances, and year of infectious salmon anemia cases were not associated with time to first ISAV detection. Time to depopulation for sites infected with the ISAV-HPRΔ variant was not associated with ISAV North American or European clades CONCLUSION: Our results contribute to the further understanding of the changing dynamics of infectious salmon anemia detections in Newfoundland and Labrador since its first detection in 2012 and will likely assist in the design of improved disease surveillance and control programs in the province |
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| Beschreibung: | Date Completed 22.12.2023 Date Revised 22.12.2023 published: Print Citation Status MEDLINE |
| ISSN: | 1548-8667 |
| DOI: | 10.1002/aah.10205 |