Design of a detection survey for Ostreid herpesvirus-1 using hydrodynamic dispersion models to determine epidemiological units

Pande, Anjali; Acosta, Hernando Sáenz; Brangenberg, Naya; Keeling, Stephanie

doi:10.1016/j.prevetmed.2015.02.009

Cited by 15 publications

(11 citation statements)

References 12 publications

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“…In New South Wales, Australia, whole estuaries are considered as epidemiological units, and movements of live animals between estuaries are regulated depending on disease risks. Finally, in New Zealand, hydrodynamically modelled epidemiological units are currently being proposed for detection surveys of waterborne diseases [83,84].…”

Section: Principles Of Control Of Marine Diseasesmentioning

confidence: 99%

Infectious diseases in oyster aquaculture require a new integrated approach

Pernet

Lupo

Bacher

et al. 2016

Phil. Trans. R. Soc. B

121

107

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Emerging diseases pose a recurrent threat to bivalve aquaculture. Recently, massive mortality events in the Pacific oyster Crassostrea gigas associated with the detection of a microvariant of the ostreid herpesvirus 1 (OsHV-1µVar) have been reported in Europe, Australia and New Zealand. Although the spread of disease is often viewed as a governance failure, we suggest that the development of protective measures for bivalve farming is presently held back by the lack of key scientific knowledge. In this paper, we explore the case for an integrated approach to study the management of bivalve disease, using OsHV-1 as a case study. Reconsidering the key issues by incorporating multidisciplinary science could provide a holistic understanding of OsHV-1 and increase the benefit of research to policymakers.

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Section: Principles Of Control Of Marine Diseasesmentioning

confidence: 99%

Infectious diseases in oyster aquaculture require a new integrated approach

Pernet

Lupo

Bacher

et al. 2016

Phil. Trans. R. Soc. B

121

107

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“…However, observed results were not optimal and moderate/high spat mortality was also recorded probably because water temperature was still below 25°C, and therefore, within the temperature range for virus activation and inducing oyster mortalities. Furthermore, other variables, more difficult to identify, such as the raft location inside the bay and thus, particular water currents surrounding the raft site could potentially also play a role in the distribution of mortality events (Pande et al, 2015). The patchy and clustered distribution of herpesvirus oyster mortality has already been reported and potentially linked with local hydrodynamics and herpesvirus being transported by planktonic particles (Paul-Pont et al, 2013b).…”

Section: Discussionmentioning

confidence: 99%

A Production Calendar Based on Water Temperature, Spat Size, and Husbandry Practices Reduce OsHV-1 μvar Impact on Cultured Pacific Oyster Crassostrea gigas in the Ebro Delta (Catalonia), Mediterranean Coast of Spain

et al. 2017

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Since 2006, the production of Pacific oyster Crassostrea gigas in the Ebro Delta area has dramatically declined from around 800 metric tons (MT) per year to 138 MT in 2011. This decline in production has had a significant socio-economic impact in a region where the shellfish sector is a traditional economic activity for many families. The identified agent responsible for this reduction in C. gigas production was Ostreid Herpesvirus microvar (OsHV-1 μvar), which has been associated with C. gigas spat mortalities in France, and in many other countries. In Spain the episodes of mortality became critical for the regional shellfish production between 2008 until 2014, with mortality percentage up to 100%. In this study, local hatchery C. gigas spat was used as sentinel animals for epidemiological studies and management tests carried out with the aim of reducing oyster mortality in the Ebro Delta area. A production calendar mainly based on water temperature dynamics was designed around an optimal schedule for spat immersion. The immersion calendar included two optimal periods for spat immersion, in summer when temperatures are ≥25°C and at the end of autumn and beginning of winter when they are ≤13°C. Such production planning has reduced mortalities from 80% (in 2014 and previous years) to 2–7.5% in 2015 in cemented oysters. Furthermore, other recommendations related to spat immersion size, culture density and methodology, and cementing calendar, which helped to achieve the results presented, were also recorded and transferred to local producers. This work presents a successfully tested management strategy reducing OsHV-1 μvar impact by designing new field management practices mainly focused on the handling and timing of spat immersion. This approach could be used as a management model in areas presenting similar production practices and environmental characteristics.

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“…Nevertheless, it is also possible that OsHV‐1 has low pathogenicity (Pande et al . ), although Burge et al . () indicated that pathogenicity varied with the size of the host oyster.…”

Section: Pathogen Factorsmentioning

confidence: 94%

A literature review as an aid to identify strategies for mitigating ostreid herpesvirus 1 in Crassostrea gigas hatchery and nursery systems

Rodgers

Arzul

Carrasco

et al. 2018

Reviews in Aquaculture

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An understanding of husbandry strategies and any associated risk factors is important for designing management control measures that can reduce mortality in Pacific oysters, Crassostrea gigas, caused by ostreid herpesvirus 1 (OsHV-1). The type of culture facility can be considered in relation to the potential pathways that could lead to the entry of a pathogen and its survival. In addition, the animal host (e.g. age, physiological state, selective breeding programmes), husbandry procedures (e.g. stocking density), the pathogen itself (e.g. pathogenicity, virulence) and environmental effects (e.g. temperature) represent other relevant interconnected factors. However, all these factors provide valuable background information for outlining the mitigation strategies needed by the industry, as well as in the context of surveillance and biosecurity programmes. These control mechanisms for hatchery or nursery areas are related to movement restrictions, water treatment, virus inactivation, the production calendar and practical farm management decisions. This comprehensive literature review compiles information related to such approaches and also includes the different existing guidelines suggested for control of OsHV-1. Therefore, the review represents a solid foundation for a more critical appraisal currently being developed to support recommendations for disease management strategies.

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Design of a detection survey for Ostreid herpesvirus-1 using hydrodynamic dispersion models to determine epidemiological units

Cited by 15 publications

References 12 publications

Infectious diseases in oyster aquaculture require a new integrated approach

Infectious diseases in oyster aquaculture require a new integrated approach

A Production Calendar Based on Water Temperature, Spat Size, and Husbandry Practices Reduce OsHV-1 μvar Impact on Cultured Pacific Oyster Crassostrea gigas in the Ebro Delta (Catalonia), Mediterranean Coast of Spain

A literature review as an aid to identify strategies for mitigating ostreid herpesvirus 1 in Crassostrea gigas hatchery and nursery systems

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