Bovine respiratory syncytial virus and bovine coronavirus in Swedish organic and conventional dairy herds
Identifieur interne : 000974 ( Main/Exploration ); précédent : 000973; suivant : 000975Bovine respiratory syncytial virus and bovine coronavirus in Swedish organic and conventional dairy herds
Auteurs : Cecilia Wolff [Suède] ; Ulf Emanuelson [Suède] ; Anna Ohlson [Suède] ; Stefan Alenius [Suède] ; Nils Fall [Suède]Source :
- Acta Veterinaria Scandinavica [ 0044-605X ] ; 2015.
Abstract
Infections with bovine respiratory syncytial virus (BRSV) and bovine coronavirus (BoCV) are endemic to the cattle populations in most countries, causing respiratory and/or enteric disease. It has been demonstrated that herds can remain free from these infections for several years also in high prevalence areas. Organically managed (OM) dairy herds have been shown to have lower seroprevalence of both viruses compared to conventionally managed (CM) herds. The objective of this study was to challenge the hypothesis of a lower occurrence of BRSV and BoCV in OM compared to CM dairy herds.
In November 2011, May 2012 and May 2013 milk samples from four homebred primiparous cows were collected in 75 to 65 OM and 69 to 62 CM herds. The antibody status regarding BRSV and BoCV was analysed with commercial indirect ELISAs. Herds were classified as positive if at least one individual sample was positive.
The prevalence of positive herds ranged from 73.4% to 82.3% for BRSV and from 76.8% to 85.3% for BoCV among OM and CM herds, over the three sampling occasions. There was no statistically significant difference between OM and CM herds at any sampling occasion. The incidence risk of newly infected herds did not differ statistically between OM and CM herds at any sampling occasion, neither for BRSV nor for BoCV. The incidence of herds turning sero-negative between samplings corresponded to the incidence of newly infected. Bulk tank milk (BTM) samples were also sampled in the herds and analysed. Several herds were negative on individual samples but positive in BTM. Herd-level data on production, health and reproduction were retrieved from VÄXA Sweden and the study herds were representative of the source population.
There was no difference in prevalence of or incidence risk for BRSV or BoCV between Swedish OM and CM herds. Because the incidence of herds becoming seropositive was balanced by herds becoming seronegative it should be possible to lower the prevalence of these two infections among Swedish dairy cattle herds if biosecurity is improved.
The online version of this article (doi:10.1186/s13028-014-0091-x) contains supplementary material, which is available to authorized users.
Url:
DOI: 10.1186/s13028-014-0091-x
PubMed: 25582919
PubMed Central: 4300160
Affiliations:
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type="wicri:Area/Main/Exploration">000974</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Bovine respiratory syncytial virus and bovine coronavirus in Swedish organic and conventional dairy herds</title><author><name sortKey="Wolff, Cecilia" sort="Wolff, Cecilia" uniqKey="Wolff C" first="Cecilia" last="Wolff">Cecilia Wolff</name><affiliation wicri:level="1"><nlm:aff id="Aff1">Department of Clinical Sciences, Swedish University of Agricultural Sciences, PO Box 7054, SE-75007 Uppsala, Sweden</nlm:aff><country xml:lang="fr">Suède</country><wicri:regionArea>Department of Clinical Sciences, Swedish University of Agricultural Sciences, PO Box 7054, SE-75007 Uppsala</wicri:regionArea><wicri:noRegion>SE-75007 Uppsala</wicri:noRegion></affiliation></author><author><name sortKey="Emanuelson, Ulf" sort="Emanuelson, Ulf" uniqKey="Emanuelson U" first="Ulf" last="Emanuelson">Ulf Emanuelson</name><affiliation wicri:level="1"><nlm:aff id="Aff1">Department of Clinical Sciences, Swedish University of Agricultural Sciences, PO Box 7054, SE-75007 Uppsala, Sweden</nlm:aff><country xml:lang="fr">Suède</country><wicri:regionArea>Department of Clinical Sciences, Swedish University of Agricultural Sciences, PO Box 7054, SE-75007 Uppsala</wicri:regionArea><wicri:noRegion>SE-75007 Uppsala</wicri:noRegion></affiliation></author><author><name sortKey="Ohlson, Anna" sort="Ohlson, Anna" uniqKey="Ohlson A" first="Anna" last="Ohlson">Anna Ohlson</name><affiliation wicri:level="1"><nlm:aff id="Aff2">Växa Sverige, PO Box 210, SE-101 24 Stockholm, Sweden</nlm:aff><country xml:lang="fr">Suède</country><wicri:regionArea>Växa Sverige, PO Box 210, SE-101 24 Stockholm</wicri:regionArea><wicri:noRegion>SE-101 24 Stockholm</wicri:noRegion></affiliation></author><author><name sortKey="Alenius, Stefan" sort="Alenius, Stefan" uniqKey="Alenius S" first="Stefan" last="Alenius">Stefan Alenius</name><affiliation wicri:level="1"><nlm:aff id="Aff1">Department of Clinical Sciences, Swedish University of Agricultural Sciences, PO Box 7054, SE-75007 Uppsala, Sweden</nlm:aff><country xml:lang="fr">Suède</country><wicri:regionArea>Department of Clinical Sciences, Swedish University of Agricultural Sciences, PO Box 7054, SE-75007 Uppsala</wicri:regionArea><wicri:noRegion>SE-75007 Uppsala</wicri:noRegion></affiliation></author><author><name sortKey="Fall, Nils" sort="Fall, Nils" uniqKey="Fall N" first="Nils" last="Fall">Nils Fall</name><affiliation wicri:level="1"><nlm:aff id="Aff1">Department of Clinical Sciences, Swedish University of Agricultural Sciences, PO Box 7054, SE-75007 Uppsala, Sweden</nlm:aff><country xml:lang="fr">Suède</country><wicri:regionArea>Department of Clinical Sciences, Swedish University of Agricultural Sciences, PO Box 7054, SE-75007 Uppsala</wicri:regionArea><wicri:noRegion>SE-75007 Uppsala</wicri:noRegion></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="2015">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Background</title><p>Infections with bovine respiratory syncytial virus (BRSV) and bovine coronavirus (BoCV) are endemic to the cattle populations in most countries, causing respiratory and/or enteric disease. It has been demonstrated that herds can remain free from these infections for several years also in high prevalence areas. Organically managed (OM) dairy herds have been shown to have lower seroprevalence of both viruses compared to conventionally managed (CM) herds. The objective of this study was to challenge the hypothesis of a lower occurrence of BRSV and BoCV in OM compared to CM dairy herds.</p><p>In November 2011, May 2012 and May 2013 milk samples from four homebred primiparous cows were collected in 75 to 65 OM and 69 to 62 CM herds. The antibody status regarding BRSV and BoCV was analysed with commercial indirect ELISAs. Herds were classified as positive if at least one individual sample was positive.</p></sec><sec><title>Results</title><p>The prevalence of positive herds ranged from 73.4% to 82.3% for BRSV and from 76.8% to 85.3% for BoCV among OM and CM herds, over the three sampling occasions. There was no statistically significant difference between OM and CM herds at any sampling occasion. The incidence risk of newly infected herds did not differ statistically between OM and CM herds at any sampling occasion, neither for BRSV nor for BoCV. The incidence of herds turning sero-negative between samplings corresponded to the incidence of newly infected. Bulk tank milk (BTM) samples were also sampled in the herds and analysed. Several herds were negative on individual samples but positive in BTM. Herd-level data on production, health and reproduction were retrieved from VÄXA Sweden and the study herds were representative of the source population.</p></sec><sec><title>Conclusion</title><p>There was no difference in prevalence of or incidence risk for BRSV or BoCV between Swedish OM and CM herds. Because the incidence of herds becoming seropositive was balanced by herds becoming seronegative it should be possible to lower the prevalence of these two infections among Swedish dairy cattle herds if biosecurity is improved.</p></sec><sec><title>Electronic supplementary material</title><p>The online version of this article (doi:10.1186/s13028-014-0091-x) contains supplementary material, which is available to authorized users.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Luzzago, C" uniqKey="Luzzago C">C Luzzago</name></author><author><name sortKey="Bronzo, V" uniqKey="Bronzo V">V Bronzo</name></author><author><name sortKey="Salvetti, S" uniqKey="Salvetti S">S Salvetti</name></author><author><name sortKey="Frigerio, M" uniqKey="Frigerio M">M Frigerio</name></author><author><name sortKey="Ferrari, N" uniqKey="Ferrari N">N Ferrari</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Paton, 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sortKey="Bennedsgaard, Tw" uniqKey="Bennedsgaard T">TW Bennedsgaard</name></author><author><name sortKey="Thamsborg, Sm" uniqKey="Thamsborg S">SM Thamsborg</name></author><author><name sortKey="Vaarst, M" uniqKey="Vaarst M">M Vaarst</name></author><author><name sortKey="Enevoldsen, C" uniqKey="Enevoldsen C">C Enevoldsen</name></author></analytic></biblStruct><biblStruct></biblStruct></listBibl></div1></back></TEI><affiliations><list><country><li>Suède</li></country></list><tree><country name="Suède"><noRegion><name sortKey="Wolff, Cecilia" sort="Wolff, Cecilia" uniqKey="Wolff C" first="Cecilia" last="Wolff">Cecilia Wolff</name></noRegion><name sortKey="Alenius, Stefan" sort="Alenius, Stefan" uniqKey="Alenius S" first="Stefan" last="Alenius">Stefan Alenius</name><name sortKey="Emanuelson, Ulf" sort="Emanuelson, Ulf" uniqKey="Emanuelson U" first="Ulf" last="Emanuelson">Ulf Emanuelson</name><name sortKey="Fall, Nils" sort="Fall, Nils" uniqKey="Fall N" first="Nils" last="Fall">Nils Fall</name><name sortKey="Ohlson, Anna" sort="Ohlson, Anna" uniqKey="Ohlson A" first="Anna" last="Ohlson">Anna Ohlson</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Sante/explor/CovidV1/Data/Main/Exploration
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Ou
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Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Sante
|area= CovidV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= PMC:4300160
|texte= Bovine respiratory syncytial virus and bovine coronavirus in Swedish organic and conventional dairy herds
}}
Pour générer des pages wiki
HfdIndexSelect -h $EXPLOR_AREA/Data/Main/Exploration/RBID.i -Sk "pubmed:25582919" \
| HfdSelect -Kh $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd \
| NlmPubMed2Wicri -a CovidV1
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