Bovine respiratory syncytial virus outbreak reduced bulls’ weight gain and feed conversion for eight months in a Norwegian beef herd
Identifieur interne : 000102 ( Pmc/Curation ); précédent : 000101; suivant : 000103Bovine respiratory syncytial virus outbreak reduced bulls’ weight gain and feed conversion for eight months in a Norwegian beef herd
Auteurs : Thea Blystad Klem [Norvège] ; Hans Petter Kj Stad [Norvège] ; Eiliv Kummen [Norvège] ; Hallstein Holen [Norvège] ; Maria Stokstad [Norvège]Source :
- Acta Veterinaria Scandinavica [ 0044-605X ] ; 2016.
Abstract
Cost-benefit evaluation of measures against respiratory disease in cattle requires accounting with the associated production losses. Investigations of naturally occurring respiratory infections in a herd setting are an opportunity for accurate estimates of the consequences. This article presents estimates based on individual monitoring of weight and concentrate intake of several hundred bulls previous to, during and after a respiratory infection outbreak with bovine respiratory syncytial virus (BRSV) as the main pathogen. The aim of the study was to analyse the association between exposure to BRSV, weight gain and feed conversion rate, quantify any change in these parameters, and estimate the duration of the change in production.
A comparison of growth curves for the bulls that were present during the outbreak revealed that bulls with severe clinical signs had a clear and consistent trend of poorer growth rate than those with milder or no signs. The weight/age-ratio was 0.04–0.10 lower in the severely affected bulls, and evident throughout the study period of 8 months. A comparison of growth rates between apparently healthy bulls being present during the outbreak and a comparable group of bulls exactly 1 year later (n = 377) showed a reduced growth rate of 111 g/day in the first group. The difference amounted to 23 extra days needed to reach the reference weight. Feed conversion was also reduced by 79 g weight gain/kilogram concentrate consumed in the outbreak year.
This study indicates significant negative effects on performance of animals that develop severe clinical signs in the acute stage, and that the growth and production is negatively affected many months after apparent recovery. In addition, the performance of apparently healthy animals that are exposed during an outbreak are severely negatively affected. The duration of this decrease in production in animals after recovery, or animals that have not shown disease at all, has not previously been documented. These losses will easily be underestimated, but contribute significantly to the costs for the producer. The findings emphasize the importance of BRSV infection for profitability and animal welfare in cattle husbandry. The study also illustrates that utilising intra-herd comparison of health and production parameters is a productive approach to estimate consequences of an outbreak.
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DOI: 10.1186/s13028-016-0190-y
PubMed: 26810215
PubMed Central: 4727385
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Bovine respiratory syncytial virus outbreak reduced bulls’ weight gain and feed conversion for eight months in a Norwegian beef herd</title><author><name sortKey="Klem, Thea Blystad" sort="Klem, Thea Blystad" uniqKey="Klem T" first="Thea Blystad" last="Klem">Thea Blystad Klem</name><affiliation wicri:level="1"><nlm:aff id="Aff1">Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep, 0033 Oslo, Norway</nlm:aff><country xml:lang="fr">Norvège</country><wicri:regionArea>Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep, 0033 Oslo</wicri:regionArea></affiliation></author><author><name sortKey="Kj Stad, Hans Petter" sort="Kj Stad, Hans Petter" uniqKey="Kj Stad H" first="Hans Petter" last="Kj Stad">Hans Petter Kj Stad</name><affiliation wicri:level="1"><nlm:aff id="Aff1">Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep, 0033 Oslo, Norway</nlm:aff><country xml:lang="fr">Norvège</country><wicri:regionArea>Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep, 0033 Oslo</wicri:regionArea></affiliation></author><author><name sortKey="Kummen, Eiliv" sort="Kummen, Eiliv" uniqKey="Kummen E" first="Eiliv" last="Kummen">Eiliv Kummen</name><affiliation wicri:level="1"><nlm:aff id="Aff2">Geno Performance Test Centre, 2636 Øyer, Norway</nlm:aff><country xml:lang="fr">Norvège</country><wicri:regionArea>Geno Performance Test Centre, 2636 Øyer</wicri:regionArea></affiliation></author><author><name sortKey="Holen, Hallstein" sort="Holen, Hallstein" uniqKey="Holen H" first="Hallstein" last="Holen">Hallstein Holen</name><affiliation wicri:level="1"><nlm:aff id="Aff2">Geno Performance Test Centre, 2636 Øyer, Norway</nlm:aff><country xml:lang="fr">Norvège</country><wicri:regionArea>Geno Performance Test Centre, 2636 Øyer</wicri:regionArea></affiliation></author><author><name sortKey="Stokstad, Maria" sort="Stokstad, Maria" uniqKey="Stokstad M" first="Maria" last="Stokstad">Maria Stokstad</name><affiliation wicri:level="1"><nlm:aff id="Aff1">Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep, 0033 Oslo, Norway</nlm:aff><country xml:lang="fr">Norvège</country><wicri:regionArea>Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep, 0033 Oslo</wicri:regionArea></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">26810215</idno><idno type="pmc">4727385</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4727385</idno><idno type="RBID">PMC:4727385</idno><idno type="doi">10.1186/s13028-016-0190-y</idno><date when="2016">2016</date><idno type="wicri:Area/Pmc/Corpus">000102</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000102</idno><idno type="wicri:Area/Pmc/Curation">000102</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">000102</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Bovine respiratory syncytial virus outbreak reduced bulls’ weight gain and feed conversion for eight months in a Norwegian beef herd</title><author><name sortKey="Klem, Thea Blystad" sort="Klem, Thea Blystad" uniqKey="Klem T" first="Thea Blystad" last="Klem">Thea Blystad Klem</name><affiliation wicri:level="1"><nlm:aff id="Aff1">Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep, 0033 Oslo, Norway</nlm:aff><country xml:lang="fr">Norvège</country><wicri:regionArea>Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep, 0033 Oslo</wicri:regionArea></affiliation></author><author><name sortKey="Kj Stad, Hans Petter" sort="Kj Stad, Hans Petter" uniqKey="Kj Stad H" first="Hans Petter" last="Kj Stad">Hans Petter Kj Stad</name><affiliation wicri:level="1"><nlm:aff id="Aff1">Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep, 0033 Oslo, Norway</nlm:aff><country xml:lang="fr">Norvège</country><wicri:regionArea>Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep, 0033 Oslo</wicri:regionArea></affiliation></author><author><name sortKey="Kummen, Eiliv" sort="Kummen, Eiliv" uniqKey="Kummen E" first="Eiliv" last="Kummen">Eiliv Kummen</name><affiliation wicri:level="1"><nlm:aff id="Aff2">Geno Performance Test Centre, 2636 Øyer, Norway</nlm:aff><country xml:lang="fr">Norvège</country><wicri:regionArea>Geno Performance Test Centre, 2636 Øyer</wicri:regionArea></affiliation></author><author><name sortKey="Holen, Hallstein" sort="Holen, Hallstein" uniqKey="Holen H" first="Hallstein" last="Holen">Hallstein Holen</name><affiliation wicri:level="1"><nlm:aff id="Aff2">Geno Performance Test Centre, 2636 Øyer, Norway</nlm:aff><country xml:lang="fr">Norvège</country><wicri:regionArea>Geno Performance Test Centre, 2636 Øyer</wicri:regionArea></affiliation></author><author><name sortKey="Stokstad, Maria" sort="Stokstad, Maria" uniqKey="Stokstad M" first="Maria" last="Stokstad">Maria Stokstad</name><affiliation wicri:level="1"><nlm:aff id="Aff1">Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep, 0033 Oslo, Norway</nlm:aff><country xml:lang="fr">Norvège</country><wicri:regionArea>Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep, 0033 Oslo</wicri:regionArea></affiliation></author></analytic><series><title level="j">Acta Veterinaria Scandinavica</title><idno type="ISSN">0044-605X</idno><idno type="eISSN">1751-0147</idno><imprint><date when="2016">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Background</title><p>Cost-benefit evaluation of measures against respiratory disease in cattle requires accounting with the associated production losses. Investigations of naturally occurring respiratory infections in a herd setting are an opportunity for accurate estimates of the consequences. This article presents estimates based on individual monitoring of weight and concentrate intake of several hundred bulls previous to, during and after a respiratory infection outbreak with bovine respiratory syncytial virus (BRSV) as the main pathogen. The aim of the study was to analyse the association between exposure to BRSV, weight gain and feed conversion rate, quantify any change in these parameters, and estimate the duration of the change in production.</p></sec><sec><title>Results</title><p>A comparison of growth curves for the bulls that were present during the outbreak revealed that bulls with severe clinical signs had a clear and consistent trend of poorer growth rate than those with milder or no signs. The weight/age-ratio was 0.04–0.10 lower in the severely affected bulls, and evident throughout the study period of 8 months. A comparison of growth rates between apparently healthy bulls being present during the outbreak and a comparable group of bulls exactly 1 year later (n = 377) showed a reduced growth rate of 111 g/day in the first group. The difference amounted to 23 extra days needed to reach the reference weight. Feed conversion was also reduced by 79 g weight gain/kilogram concentrate consumed in the outbreak year.</p></sec><sec><title>Conclusion</title><p>This study indicates significant negative effects on performance of animals that develop severe clinical signs in the acute stage, and that the growth and production is negatively affected many months after apparent recovery. In addition, the performance of apparently healthy animals that are exposed during an outbreak are severely negatively affected. The duration of this decrease in production in animals after recovery, or animals that have not shown disease at all, has not previously been documented. These losses will easily be underestimated, but contribute significantly to the costs for the producer. The findings emphasize the importance of BRSV infection for profitability and animal welfare in cattle husbandry. The study also illustrates that utilising intra-herd comparison of health and production parameters is a productive approach to estimate consequences of an outbreak.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Snowder, Gd" uniqKey="Snowder G">GD Snowder</name></author><author><name sortKey="Van Vleck, Ld" uniqKey="Van Vleck L">LD Van Vleck</name></author><author><name sortKey="Cundiff, Lv" uniqKey="Cundiff L">LV Cundiff</name></author><author><name sortKey="Bennett, Gl" uniqKey="Bennett G">GL Bennett</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kaneene, Jb" uniqKey="Kaneene J">JB Kaneene</name></author><author><name sortKey="Scott Hurd, H" uniqKey="Scott Hurd H">H Scott Hurd</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Griffin, D" uniqKey="Griffin D">D Griffin</name></author></analytic></biblStruct><biblStruct><analytic><author><name 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<front><journal-meta><journal-id journal-id-type="nlm-ta">Acta Vet Scand</journal-id><journal-id journal-id-type="iso-abbrev">Acta Vet. Scand</journal-id><journal-title-group><journal-title>Acta Veterinaria Scandinavica</journal-title></journal-title-group><issn pub-type="ppub">0044-605X</issn><issn pub-type="epub">1751-0147</issn><publisher><publisher-name>BioMed Central</publisher-name><publisher-loc>London</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">26810215</article-id><article-id pub-id-type="pmc">4727385</article-id><article-id pub-id-type="publisher-id">190</article-id><article-id pub-id-type="doi">10.1186/s13028-016-0190-y</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research</subject></subj-group></article-categories><title-group><article-title>Bovine respiratory syncytial virus outbreak reduced bulls’ weight gain and feed conversion for eight months in a Norwegian beef herd</article-title></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name><surname>Klem</surname><given-names>Thea Blystad</given-names></name><address><email>thea.klem@nmbu.no</email></address><xref ref-type="aff" rid="Aff1">1</xref></contrib><contrib contrib-type="author"><name><surname>Kjæstad</surname><given-names>Hans Petter</given-names></name><address><email>hans.p.kjaestad@nmbu.no</email></address><xref ref-type="aff" rid="Aff1">1</xref></contrib><contrib contrib-type="author"><name><surname>Kummen</surname><given-names>Eiliv</given-names></name><address><email>eiliv.kummen@geno.no</email></address><xref ref-type="aff" rid="Aff2">2</xref></contrib><contrib contrib-type="author"><name><surname>Holen</surname><given-names>Hallstein</given-names></name><address><email>hallstein.holen@geno.no</email></address><xref ref-type="aff" rid="Aff2">2</xref></contrib><contrib contrib-type="author"><name><surname>Stokstad</surname><given-names>Maria</given-names></name><address><email>maria.stokstad@nmbu.no</email></address><xref ref-type="aff" rid="Aff1">1</xref></contrib><aff id="Aff1"><label>1</label>Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, P.O. Box 8146 Dep, 0033 Oslo, Norway</aff><aff id="Aff2"><label>2</label>Geno Performance Test Centre, 2636 Øyer, Norway</aff></contrib-group><pub-date pub-type="epub"><day>25</day><month>1</month><year>2016</year></pub-date><pub-date pub-type="pmc-release"><day>25</day><month>1</month><year>2016</year></pub-date><pub-date pub-type="collection"><year>2016</year></pub-date><volume>58</volume><elocation-id>8</elocation-id><history><date date-type="received"><day>23</day><month>9</month><year>2015</year></date><date date-type="accepted"><day>16</day><month>1</month><year>2016</year></date></history><permissions><copyright-statement>© Klem et al. 2016</copyright-statement><license license-type="OpenAccess"><license-p><bold>Open Access</bold>This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/4.0/">http://creativecommons.org/licenses/by/4.0/</ext-link>), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/publicdomain/zero/1.0/">http://creativecommons.org/publicdomain/zero/1.0/</ext-link>) applies to the data made available in this article, unless otherwise stated.</license-p></license></permissions><abstract id="Abs1"><sec><title>Background</title><p>Cost-benefit evaluation of measures against respiratory disease in cattle requires accounting with the associated production losses. Investigations of naturally occurring respiratory infections in a herd setting are an opportunity for accurate estimates of the consequences. This article presents estimates based on individual monitoring of weight and concentrate intake of several hundred bulls previous to, during and after a respiratory infection outbreak with bovine respiratory syncytial virus (BRSV) as the main pathogen. The aim of the study was to analyse the association between exposure to BRSV, weight gain and feed conversion rate, quantify any change in these parameters, and estimate the duration of the change in production.</p></sec><sec><title>Results</title><p>A comparison of growth curves for the bulls that were present during the outbreak revealed that bulls with severe clinical signs had a clear and consistent trend of poorer growth rate than those with milder or no signs. The weight/age-ratio was 0.04–0.10 lower in the severely affected bulls, and evident throughout the study period of 8 months. A comparison of growth rates between apparently healthy bulls being present during the outbreak and a comparable group of bulls exactly 1 year later (n = 377) showed a reduced growth rate of 111 g/day in the first group. The difference amounted to 23 extra days needed to reach the reference weight. Feed conversion was also reduced by 79 g weight gain/kilogram concentrate consumed in the outbreak year.</p></sec><sec><title>Conclusion</title><p>This study indicates significant negative effects on performance of animals that develop severe clinical signs in the acute stage, and that the growth and production is negatively affected many months after apparent recovery. In addition, the performance of apparently healthy animals that are exposed during an outbreak are severely negatively affected. The duration of this decrease in production in animals after recovery, or animals that have not shown disease at all, has not previously been documented. These losses will easily be underestimated, but contribute significantly to the costs for the producer. The findings emphasize the importance of BRSV infection for profitability and animal welfare in cattle husbandry. The study also illustrates that utilising intra-herd comparison of health and production parameters is a productive approach to estimate consequences of an outbreak.</p></sec></abstract><kwd-group xml:lang="en"><title>Keywords</title><kwd>Bovine respiratory disease outbreak</kwd><kwd>Weight curve</kwd><kwd>Cost estimation</kwd><kwd>Cattle</kwd><kwd>Fattening bull</kwd></kwd-group><custom-meta-group><custom-meta><meta-name>issue-copyright-statement</meta-name><meta-value>© The Author(s) 2016</meta-value></custom-meta></custom-meta-group></article-meta></front></pmc></record>Pour manipuler ce document sous Unix (Dilib)
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