Eradication of footrot of lesser clinical severity (intermediate footrot)

K.A. Abbott, J.R. Egerton

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    10 Citations (Scopus)

    Abstract

    Objective: To determine if intermediate footrot (IFR) can be eradicated from a flock of sheep by inspection and culling of cases during a non-transmission period and if prior antibiotic treatment or vaccination increases the likelihood of eradication. Procedure: A replicated field experiment that compared the three eradication strategies was followed by an observational study of the best of these applied in a commercial flock of 3000 sheep. Results: In the replicated experiment, IFR was eradicated either by inspection and culling alone, or when combined with vaccination. Eradication failed when the sheep were treated with parenteral antibiotics before inspection and culling during the non-transmission period. In the whole-flock program, eradication by repeated inspection and culling of footrot cases during the non-transmission period was successful and the flock remained free of infection 3 years later. Conclusions: IFR can be eradicated by inspection and culling but latent infections, which may persist undetected for at least 34 weeks, require surveillance inspections to be repeated during the non-transmission phase of the program. The use of parenteral antibiotics as an aid to the eradication of IFR is contraindicated.
    Original languageEnglish
    Pages (from-to)688-693
    Number of pages6
    JournalAustralian Veterinary Journal
    Volume81
    Issue number11
    DOIs
    Publication statusPublished - 2003

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