Epidemiological investigation of the re-emergence of infectious salmon anemia in Chile

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dc.contributor.authorMardones, Fernando O.
dc.date.accessioned2023-01-16T16:27:15Z
dc.date.available2023-01-16T16:27:15Z
dc.date.issued2009
dc.description.abstractReports from surveillance activities were analyzed to determine the epidemiology of the re-emergence of infectious salmon anemia virus (ISAV) in Atlantic salmon farms in Chile. The epidemic and spatial and spatiotemporal patterns were described, taking into account commercial compartmentalization of the farms. During the 64 wk study period, 76 ISAV-infected salmon farms, representing 17 companies, were reported in 65% of the management geographic zones of the 10th region in southern Chile. Approximately 20% of the farms at risk became infected, with the incidence rate increasing slightly over time. Results from epidemic analyses and observed spatial and spatiotemporal patterns suggested an initial dispersal and subsequent clustering of cases around the index case (IC) in a propagated epidemic mode. Results suggested that delayed depopulation may have been a key factor in the spread and persistence of ISAV. Clustering of cases supported the assumption that passive transmission in seawater from ISAV-infected farms (proximity) is a critical factor in controlling disease. The re-emergence of ISAV in Chile has resulted in one of the largest ISAV epidemics reported in the world and this study generates new hypotheses and provides useful information for spatial disease control planning in salmon farming areas.
dc.fechaingreso.objetodigital2023-01-13
dc.fuente.origenSIPA
dc.identifier.doi10.3354/dao02040
dc.identifier.eissn1616-1580
dc.identifier.issn0177-5103
dc.identifier.urihttps://doi.org/10.3354/dao02040
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/66342
dc.information.autorucMedicina veterinaria ; Mardones, Fernando O. ; 0000-0003-1228-5392 ; 1084534
dc.language.isoen
dc.nota.accesoContenido completo
dc.pagina.final114
dc.pagina.inicio105
dc.revistaDiseases of Aquatic Organisms
dc.rightsacceso abierto
dc.titleEpidemiological investigation of the re-emergence of infectious salmon anemia in Chile
dc.typeartículo
dc.volumen84
sipa.codpersvinculados1084534
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