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BRD vaccination strongly reduces the use of antibiotics in Dutch dairy calves
Wille, G.B.; Kuijk, H.; Vertenten...
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Objectives: A substantial portion of antibiotics applied in the dairy sector are used for controlling respiratory diseases (BRD) in young stock. Vaccination against BRD pathogens may be a strategy to reduce antibiotics, and therefore an optimization for long-term performance of dairy cattle. In this field observational study, the antibiotic use in young stock on several Dutch dairy farms was measured depending on the used BRD vaccination program.
Materials and Methods: 250 Dutch dairy farms were involved. In 159 farms calves were treated against BRD and/or vaccinated against BRD. These 159 ‘BRD’ farms were divided in 3 groups depending on the BRD vaccination protocol. Group A did not vaccinate, group B vaccinated only in autumn with an inactivated multivalent BRD vaccine (Bovilis® Bovipast RSP) and group C vaccinated all year round with the same vaccine. The antibiotic treatment percentage (TP) was calculated as the number of calves of 60kg bodyweight that could theoretically be treated with the amount of antibiotics actually used in 2017 to treat BRD in young animals divided by the number of calves born in 2017. Groups were compared for the number of farms that had an antibiotic treatment percentage higher than 20 (TP>20).
Results: Only 63 (40%) of the 159 ’BRD’ farms had a BRD vaccination program. Group A, B, and C had respectively 96, 36 and 27 farms. The TP>20 was respectively 84%, 47% and 26% for group A, B and C (p<0.001). The TP>20 was significantly different between group A and B (p<0.001) and between group A and C (p<0.001), but not between group B and C (p=0.14). The odds to have TP>20 is 83% lower in group B compared to group A, and 94% lower in group C compared to group A (p<0.001).
Conclusion: This study clearly demonstrates the potential of vaccination with a multivalent inactivated BRD vaccine (Bovilis Bovipast RSP) to reduce the antibiotic use in dairy young stock. In this study, a strong reduction was seen in the antibiotic treatment percentage of farms using this vaccine, with the strongest reduction on farms vaccinating all year round.
Keywords: BRD vaccination, reduction antibiotics, dairy calves.
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Affiliation of the authors at the time of publication
Slingeland Dierenartsen, Varsseveld, Netherlands;
MSD Animal Health, Boxmeer, Netherlands.
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