[Retrospective study on the eradication of Swine Dysentery (Brachyspira hyodysenteriae) in Switzerland]

Cadetg, Rebekka; Vidondo, Beatriz; Nathues, Heiko; Schüpbach, Gertraud Irene; Zeeh, Friederike (2019). [Retrospective study on the eradication of Swine Dysentery (Brachyspira hyodysenteriae) in Switzerland]. Schweizer Archiv für Tierheilkunde, 161(4), pp. 217-230. Huber 10.17236/sat00202

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The eradication of Swine Dysentery (infection with Brachyspira hyodysenteriae) within farm populations is extremely complex and its success is significantly linked to the compliance of pig farmers performing the onsite eradications, emphasizing the importance of their motivation. The present study focuses on the motivation and satisfaction of Swiss pig farmers concerning eradication of Swine Dysentery on their farms and has the intention of generating data to establish a basis for decision-making regarding future eradications. A structured survey was conducted on 68 Swiss pig farms where an eradication of Swine Dysentery had already taken place. The data collected were then statistically analyzed. Of the study's population, 50 (73.5%) farms underwent eradication using the total depopulation method and 18 (26.5%) farms conducted an eradication process using the partial depopulation method; both in accordance to the guidelines of Switzerland's Pig Health Service (SUISAG Schweinegesundheitsdienst; SGD). When asked about the driving factors behind their decision to perform the eradications, owners cited their own interest (57.4%; 39/68) (primarily due to financial aspects (38.5%; 15/39)) or external pressure (42.7%; 29/68) (predominantly through marketers as well as through the health status assigned by the SGD (each 11/29)). The duration of the eradication on farms differed significantly and costs varied considerably within the different production types as well as the type of eradication performed. Utilized means and processes for eradication were the same (drugs, disinfectant for manure) or much alike (e.g. emptying of the pigpens) however stock-specific and individual variations were exhibited. The majority of the interviewed livestock owners were motivated to perform the eradication (86.6%; 58/67), satisfied with having performed the eradication and satisfied with the outcome of the eradication (89.7%; 61/68). The cost efficiency of the farms (54.4%; 37/68) and the health status of the herds (63.2%; 43/68) were perceived as having improved and the usage of drugs having diminished (59.7%; 40/67) post eradication. The effort of an eradication was described as acceptable to too great. The study showed herd eradication of Swine Dysentery to be perceived as mainly positive. However, effort as well as costs are felt to be considerable and could, therefore, provide the most important starting point to increasing the willingness of pig owners to perform eradications.

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