Dynamics of virus infections involved in the bovine respiratory disease complex in Swedish dairy herds.
Identifieur interne : 000F41 ( Main/Exploration ); précédent : 000F40; suivant : 000F42Dynamics of virus infections involved in the bovine respiratory disease complex in Swedish dairy herds.
Auteurs : S. H Gglund [Suède] ; C. Svensson ; U. Emanuelson ; J F Valarcher ; S. AleniusSource :
- Veterinary journal (London, England : 1997) [ 1090-0233 ] ; 2006.
Descripteurs français
- KwdFr :
- Animaux, Bovins, Femelle, Infections de l'appareil respiratoire (médecine vétérinaire), Infections de l'appareil respiratoire (virologie), Infections de l'appareil respiratoire (épidémiologie), Infections à virus à ARN (médecine vétérinaire), Infections à virus à ARN (virologie), Infections à virus à ARN (épidémiologie), Maladies des bovins (virologie), Maladies des bovins (épidémiologie), Suède (épidémiologie), Virus à ARN (isolement et purification), Élevage, Études séroépidémiologiques.
- MESH :
- isolement et purification : Virus à ARN.
- médecine vétérinaire : Infections de l'appareil respiratoire, Infections à virus à ARN.
- virologie : Infections de l'appareil respiratoire, Infections à virus à ARN, Maladies des bovins.
- épidémiologie : Infections de l'appareil respiratoire, Infections à virus à ARN, Maladies des bovins, Suède.
- Animaux, Bovins, Femelle, Élevage, Études séroépidémiologiques.
- Wicri :
- geographic : Suède.
English descriptors
- KwdEn :
- Animal Husbandry, Animals, Cattle, Cattle Diseases (epidemiology), Cattle Diseases (virology), Female, RNA Virus Infections (epidemiology), RNA Virus Infections (veterinary), RNA Virus Infections (virology), RNA Viruses (isolation & purification), Respiratory Tract Infections (epidemiology), Respiratory Tract Infections (veterinary), Respiratory Tract Infections (virology), Seroepidemiologic Studies, Sweden (epidemiology).
- MESH :
- geographic , epidemiology : Sweden.
- epidemiology : Cattle Diseases, RNA Virus Infections, Respiratory Tract Infections.
- isolation & purification : RNA Viruses.
- veterinary : RNA Virus Infections, Respiratory Tract Infections.
- virology : Cattle Diseases, RNA Virus Infections, Respiratory Tract Infections.
- Animal Husbandry, Animals, Cattle, Female, Seroepidemiologic Studies.
Abstract
The dynamics of bovine respiratory syncytial virus (BRSV), bovine parainfluenza virus 3 (PIV-3), bovine corona virus (BCoV) and bovine viral diarrhoea virus (BVDV) infections were studied in 118 dairy herds in south western Sweden. By using serology on paired samples from three approximately 7 vs. approximately 15-month-old calves per herd, the propagation of infections was investigated over about a 1-year period. The results implied that at least 74% of calves had experienced one or more of the monitored infections at the age of approximately 7 months (Sample 1, Spring); 30%, 48%, 34% and 8% were seropositive to BRSV, PIV-3, BCoV and BVDV, respectively. Seroconversions to BRSV, PIV-3, BCoV and BVDV occurred in 26%, 38%, 50% and 3% of seronegative animals and 63% had antibodies against two or more infections at approximately 15 months (Sample 2). In total, 90-97% of animals that were seropositive in Sample 1 remained positive in Sample 2. A significant association was found between BVDV and BCoV (P = 0.01). Moreover, a significantly higher proportion of herds in which no calves had a recorded history of respiratory disease (n = 15) were classified as negative to all four infections monitored when compared to herds in which disease was observed (P = 0.0002). This study showed a high infection burden in young animals and effective spread of BRSV, PIV-3 and BCoV in one area of Sweden. BVDV infections were restricted to a few herds, reflecting the effect of a voluntary control program against BVDV in Sweden.
DOI: 10.1016/j.tvjl.2005.04.029
PubMed: 15964774
Affiliations:
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Le document en format XML
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By using serology on paired samples from three approximately 7 vs. approximately 15-month-old calves per herd, the propagation of infections was investigated over about a 1-year period. The results implied that at least 74% of calves had experienced one or more of the monitored infections at the age of approximately 7 months (Sample 1, Spring); 30%, 48%, 34% and 8% were seropositive to BRSV, PIV-3, BCoV and BVDV, respectively. Seroconversions to BRSV, PIV-3, BCoV and BVDV occurred in 26%, 38%, 50% and 3% of seronegative animals and 63% had antibodies against two or more infections at approximately 15 months (Sample 2). In total, 90-97% of animals that were seropositive in Sample 1 remained positive in Sample 2. A significant association was found between BVDV and BCoV (P = 0.01). Moreover, a significantly higher proportion of herds in which no calves had a recorded history of respiratory disease (n = 15) were classified as negative to all four infections monitored when compared to herds in which disease was observed (P = 0.0002). This study showed a high infection burden in young animals and effective spread of BRSV, PIV-3 and BCoV in one area of Sweden. BVDV infections were restricted to a few herds, reflecting the effect of a voluntary control program against BVDV in Sweden.</div></front></TEI><affiliations><list><country><li>Suède</li></country></list><tree><noCountry><name sortKey="Alenius, S" sort="Alenius, S" uniqKey="Alenius S" first="S" last="Alenius">S. Alenius</name><name sortKey="Emanuelson, U" sort="Emanuelson, U" uniqKey="Emanuelson U" first="U" last="Emanuelson">U. Emanuelson</name><name sortKey="Svensson, C" sort="Svensson, C" uniqKey="Svensson C" first="C" last="Svensson">C. Svensson</name><name sortKey="Valarcher, J F" sort="Valarcher, J F" uniqKey="Valarcher J" first="J F" last="Valarcher">J F Valarcher</name></noCountry><country name="Suède"><noRegion><name sortKey="H Gglund, S" sort="H Gglund, S" uniqKey="H Gglund S" first="S" last="H Gglund">S. H Gglund</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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