A description and qualitative comparison of the elements of heterogeneous bovine viral diarrhea control programs that influence confidence of freedom

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Title: A description and qualitative comparison of the elements of heterogeneous bovine viral diarrhea control programs that influence confidence of freedom
Authors: Roon, Annika M. VanSantman-Berends, Inge M. G. A.Graham, David A.More, Simon Johnet al.
Permanent link: http://hdl.handle.net/10197/12106
Date: 1-May-2020
Online since: 2021-04-21T14:15:03Z
Abstract: For endemic infections in cattle that are not regulated at the European Union level, such as bovine viral diarrhea virus (BVDV), European Member States have implemented control or eradication programs (CEP) tailored to their specific situations. Different methods are used to assign infection-free status in CEP; therefore, the confidence of freedom associated with the “free” status generated by different CEP are difficult to compare, creating problems for the safe trade of cattle between territories. Safe trade would be facilitated with an output-based framework that enables a transparent and standardized comparison of confidence of freedom for CEP across herds, regions, or countries. The current paper represents the first step toward development of such a framework by seeking to describe and qualitatively compare elements of CEP that contribute to confidence of freedom. For this work, BVDV was used as a case study. We qualitatively compared heterogeneous BVDV CEP in 6 European countries: Germany, France, Ireland, the Netherlands, Sweden, and Scotland. Information about BVDV CEP that were in place in 2017 and factors influencing the risk of introduction and transmission of BVDV (the context) were collected using an existing tool, with modifications to collect information about aspects of control and context. For the 6 participating countries, we ranked all individual elements of the CEP and their contexts that could influence the probability that cattle from a herd categorized as BVDV-free are truly free from infection. Many differences in the context and design of BVDV CEP were found. As examples, CEP were either mandatory or voluntary, resulting in variation in risks from neighboring herds, and risk factors such as cattle density and the number of imported cattle varied greatly between territories. Differences were also found in both testing protocols and definitions of freedom from disease. The observed heterogeneity in both the context and CEP design will create difficulties when comparing different CEP in terms of confidence of freedom from infection. These results highlight the need for a standardized practical methodology to objectively and quantitatively determine confidence of freedom resulting from different CEP around the world.
Funding Details: Dutch Ministry of Agriculture, Nature and Food Quality
European Food Safety Authority
Type of material: Journal Article
Publisher: Elsevier
Journal: Journal of Dairy Science
Volume: 103
Issue: 5
Start page: 4654
End page: 4671
Copyright (published version): 2020 the Authors
Keywords: Freedom from infectionSurveillanceControl programBovine viral diarrhea virus
DOI: 10.3168/jds.2019-16915
Language: en
Status of Item: Peer reviewed
ISSN: 0022-0302
This item is made available under a Creative Commons License: https://creativecommons.org/licenses/by-nc-nd/3.0/ie/
Appears in Collections:Veterinary Medicine Research Collection
CVERA Research Collection

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