Assessment of mechanincal nociception thresholds in lame versus non-lame sows with two methods

Elena Nalon, Dominiek Maes, Brecht Devleeschauwer, Sam Millet, Miriam Van Riet, Geert Janssens, Frank Tuyttens

    Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureC3: Congres abstractpeer review

    Uittreksel

    The aim of this study was to measure the mechanical nociceptive thresholds (MT) of lame and non-lame sows with two
    methods. Two groups of sows at the same gestation stage (G1, n=12, G2, n=8) from one pig herd were used. Gait was scored on
    a 150-mm tagged visual analogue scale (VAS); sows scoring > 30mm on the VAS were classified as “lame”. MT (defined as the
    force in Newtons driving a 1 mm pin that elicited a withdrawal response) was measured on the dorsal aspect of the metatarsus/
    metacarpus of each limb. A digital algometer driving a pneumatic actuator fixed to the leg (ProdPlus MT1, TopCat Metrology
    Ltd; actuator) was used. The measurements were also taken with the hand-held version of the same instrument (ProD-Plus,
    TopCat Metrology Ltd; probe). The average of 3 consecutive measurements was considered as MT for each limb with each
    method on each of 3 testing days. In G1, the average MT (N) of the four limbs (lame vs. non-lame sows) was 14.3 (6.1) vs.
    13.7 (5.9) with the actuator and 10.5 (6.2) vs. 10.2 (6.2) with the probe. In G2, the average MT (N) was 14.8 (6.5) vs. 17.9 (6.1)
    with the actuator and 11.6 (5.5) vs. 17.4 (6.7) with the probe. The thresholds tended to be higher in the front than in the hind
    legs. The actuator yielded consistently higher MT than the probe (average difference = 3.2 N, P<0.001); therefore the methods
    should not be used interchangeably. There was low repeatability both within the same testing session and on different testing
    days with both methods (average SD of the difference = 7.9 N). Lame sows in G2 had a significantly lower (P<0.01) average
    MT than non-lame sows. This is in line with the findings of other studies on farm animals affected by lameness. There was no
    difference in G1.
    Oorspronkelijke taalEngels
    TitelProgramme & Abstract book 4th European Symposium of Porcine Health Management
    Aantal pagina’s1
    Publicatiedatum25-apr.-2012
    Pagina's114
    ISBN van geprinte versie9789079892037
    PublicatiestatusGepubliceerd - 25-apr.-2012
    Evenement4th European Symposium of Porcine Health Management - Brugge, België
    Duur: 25-apr.-201227-apr.-2012
    http://www.esphm2012.be

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