Estimating the prevalence of<i>Renibacterium salmoninarum</i>‐infected salmonid production sites

Hall, Loretta; Duguid, S; Wallace, I S; Murray, Alexander G.

doi:10.1111/jfd.12234

Cited by 9 publications

(10 citation statements)

References 12 publications

(22 reference statements)

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“…The pathogen is however rare in farmed salmon (Murray et al, 2012;Hall et al, 2015) and so frames are unlikely to be infected (VL), unless they do come from a farm with a control order (M). Even if the frames do originate from a farm with a control order, BKD is controlled using movement controls with normal slaughter and fallowing at the end of the production cycle.…”

Section: Bacterial Kidney Diseasementioning

confidence: 99%

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Does the use of salmon frames as bait for lobster/crab creel fishing significantly increase the risk of disease in farmed salmon in Scotland?

Murray

2015

Preventive Veterinary Medicine

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Section: Bacterial Kidney Diseasementioning

confidence: 99%

“…Therefore infection is less likely to be at high levels than for, say, ISA which are culled as disease is confirmed and therefore infection is active. R. salmoninarum is rare in wild fish in the UK (Murray et al, 2012), but is common in farmed trout (Hall et al, 2015).…”

Section: Bacterial Kidney Diseasementioning

confidence: 99%

Does the use of salmon frames as bait for lobster/crab creel fishing significantly increase the risk of disease in farmed salmon in Scotland?

Murray

2015

Preventive Veterinary Medicine

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“…In this case, apparently healthy individuals or subclinically infected individuals would be appropriate for pooling studies. The number of sampled individuals per pool can affect PSe results for surveillance purposes in subclinical populations (Hall et al, ; Johnson et al, ), as a function of analyte dilution. The cost of sampling and testing will also influence the choice of pool size, which should be determined a priori as part of the sampling strategy (Hall, Soje, Kilburn, Maguire, & Murray, ).…”

Section: Recommended Criteria For Pooling Samplesmentioning

confidence: 99%

To pool or not to pool? Guidelines for pooling samples for use in surveillance testing of infectious diseases in aquatic animals

Laurin

Thakur

Mohr

et al. 2019

Journal of Fish Diseases

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Samples from multiple animals may be pooled and tested to reduce costs of surveillance for infectious agents in aquatic animal populations. The primary advantage of pooling is increased population‐level coverage when prevalence is low (<10%) and the number of tests is fixed, because of increased likelihood of including target analyte from at least one infected animal in a tested pool. Important questions and a priori design considerations need to be addressed. Unfortunately, pooling recommendations in disease‐specific chapters of the 2018 OIE Aquatic Manual are incomplete and, except for amphibian chytrid fungus, are not supported by peer‐reviewed research. A systematic review identified only 12 peer‐reviewed aquatic diagnostic accuracy and surveillance studies using pooled samples. No clear patterns for pooling methods and characteristics were evident across reviewed studies, although most authors agreed there is a negative effect on detection. Therefore, our purpose was to review pooling procedures used in published aquatic infectious disease research, present evidence‐based guidelines, and provide simulated data examples for white spot syndrome virus in shrimp. A decision tree of pooling guidelines was developed for use by peer‐reviewed journals and research institutions for the design, statistical analysis and reporting of comparative accuracy studies of individual and pooled tests for surveillance purposes.

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“…The disease was detected in Norway in 1980, but is only rarely detected today with 0-3 cases annually and no detections in 2015 (Hjeltnes, 2016). In the UK, BKD has been found in both fresh -and sea water locations in Scotland, England and Wales Hall et al, 2015). Disclaimer: The present document has been produced and adopted by the bodies identified above as author(s).…”

Section: Bacterial Kidney Diseasementioning

confidence: 99%

“…The chronic nature of BKD and the presence of asymptomatic fish in the early stages of infection can be problematic when adopting control measures. Effective health monitoring of farmed stocks and attention to biosecurity systems may help avoid BKD Hall et al, 2015). If BKD was diagnosed, movement restrictions should be applied and all contact sites investigated for evidence of the disease source and spread (Hjeltnes, 2016).…”

Section: Bacterial Kidney Diseasementioning

confidence: 99%

Applicability of a food chain analysis on aquaculture of Atlantic salmon to identify and monitor vulnerabilities and drivers of change for the identification of emerging risks

Marvin

Bouzembrak

Asselt

et al. 2019

EFSA Supporting Publications

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The objective of Aquarius project was to test the applicability of a food chain analysis on Atlantic salmon farmed in Norway to identify and monitor vulnerabilities and drivers of change for the identification of emerging risks. To this end, a comprehensive literature review was conducted complemented with expert views collected by on‐line questionnaires and in‐depth interviews. This review provided an overview of the various stages in the supply chain from farm to consumer and the identification of i) existing and emerging human and animal health hazards, ii) vulnerabilities, iii) control measures, iv) drivers of change, and v) related indicators. Next step in the study was to i) complement the list of vulnerabilities followed by a prioritisation using focus group discussions and Failure Mode and Effect Analysis (FMEA) method and ii) link drivers of change acting upon the (prioritised) vulnerabilities and identification of associated indicators and data sources by means of a Delphi method. Based on the experiences obtained with the different methodologies during this project, the Aquarius team considers literature review, and a direct face‐to‐face interaction with experts (in‐depth interviews, focus group discussions and FMEA in a workshop setting) as being most effective regarding output and effort. The comprehensive information collected formed the basis for the methodology to baseline key indicators of the selected vulnerabilities. The methodology proposed comprised a Bayesian Network (BN) that links data sources for indicators and drivers of change to the prioritised vulnerabilities and was demonstrated for salmon health. A Decision Support System (DSS) with such BN integrated was designed. The current BN and DSS could flag an increased exposure of known hazards that may occur due to changes in indicators but new hazards are not identified. The proposed methodology could be used instead to show trends in vulnerabilities, indicators, increased exposure of known hazards and for scenario studies.

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Estimating the prevalence ofRenibacterium salmoninarum‐infected salmonid production sites

Cited by 9 publications

References 12 publications

Does the use of salmon frames as bait for lobster/crab creel fishing significantly increase the risk of disease in farmed salmon in Scotland?

Does the use of salmon frames as bait for lobster/crab creel fishing significantly increase the risk of disease in farmed salmon in Scotland?

To pool or not to pool? Guidelines for pooling samples for use in surveillance testing of infectious diseases in aquatic animals

Applicability of a food chain analysis on aquaculture of Atlantic salmon to identify and monitor vulnerabilities and drivers of change for the identification of emerging risks

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