[Evaluation of an polyvalent footrot vaccine in a field trial].
OBJECTIVE
The footvax® vaccine should protect sheep from footrot for a period of about 10 weeks. This is slighly shorter than the duration of the Swiss alpine pasture season. Thus, the vaccine was evaluated for its prophylactic and therapeutic effectiveness for an Alpine pasture trial season.


METHODS
Two flocks of 261 and 338 sheep were assessed in the spring for the prevalence and severity of footrot, and thereafter divided each into a vaccinated and a control group. At the end of the Alpine season, all sheep were reevaluated and the data were analyzed.


RESULTS
In both flocks, vaccinated groups showed an improvement during pasture. One flock had a significant reduction in the number of cases and improvement of case severity only in the vaccinated group. In the second flock, no significant difference between groups was found, because both groups improved while on pasture.


CONCLUSIONS
Vaccination improves footrot in flocks during the Alpine pasture season.


CONCLUSIONS
Vaccination with Footvax® is effective for footrot control, however, it cannot be used as the sole measure to control the disease during Alpine pasturing.
Institut für Agrarwissenschaften, Eidgenössische Technische Hochschule Zürich. christina-haerdi@ethz.ch
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Härdi-Landerer
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Leu
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Steiner
D000818:Animals; D001428:Bacterial Vaccines / Q000008:administration & dosage* / Q000276:immunology; D016022:Case-Control Studies; D005535:Foot Rot / Q000453:epidemiology* / Q000517:prevention & control; D015995:Prevalence; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology* / Q000517:prevention & control; D013557:Switzerland / Q000453:epidemiology
D001428:Bacterial Vaccines