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A farrow -to-finish herd free from swine dysentery - 13 years after eradication. 5 th European Symposium on Porcine Health Management, Edinburgh, UK, 22-24 May 2013. Marie Sjölund 1 , Marie Sterning 2 , Märit Pringle 1 , Claes Fellström 2
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A farrow-to-finish herd free from swine dysentery - 13 years after eradication 5th European Symposium on Porcine Health Management, Edinburgh, UK, 22-24 May 2013 Marie Sjölund1, Marie Sterning2, Märit Pringle1, Claes Fellström2 1National VeterinaryInstitute, SVA; 2Swedish University of Agricultural Sciences, SLU; Uppsala, Sweden Objective The aimwas to evaluate an eradication program for swinedysenteryperfomed 13 yearspreviously in a farrow-to-finishherd Introduction of swinedysentery by purchase of growers Brachyspirahyodysenteriaedemonstrated in 13/20 (57%) samples Hemorrhagicdiarrhea in fatteners & gilts. Lawsoniaintracellularisdemonstrated Increasedprevalence of hemorrhagicdiarrhea in fatteners Brachyspiragroup III demonstrated in 7/20 samples. Brachyspirahyodysenteriae NOT demonstrated Eradication program June-October 1999 2013 2011 1995 1997 1999 2001 2003 2005 2007 2009 Regular samplings for Brachyspiraspp. Conversion from specializedfatteningproduction to a farrow-to-finishherd Hemorrhagicdiarrhea in sows & growers • Eradication program • Sale of surplus growers (treated with 80 ppm tiamulin for 6 days) • Sowstreated with an injection of tiamulin (10 mg/kg) followed by • water medication with 120 ppm tiamulin for 11 days • Cleaning & disinfection • - Removal of slats, manurepitsemptied • - Manureremoved from yard surfaces • - Pressure-wash, drying & disinfection with glutaraldehyde • Sowsmoved to cleaned and disinfectedunits • - Sowscleaned & disinfected • - 2nd tiamulininjection (10 mg/kg) on allocation • - Water medicationcontinued for 3 days after allocation • Enforcedrodentcontrol • Dogs & cats water medicated with tiamulin Conclusions The eradication program for swinedysenteryproved to be successfulbutcompleteeradication of otherBrachyspiraspp. was not achieved. NeitherwasLawsoniaintracellulariseradicatedalthoughtiamulin is effective for treatingproliferativeenteropathy. Marie Sjölund DVM PhD Department of Animal Health and Antimicrobial Strategies Associate National Veterinary Officer NATIONAL VETERINARY INSTITUTE post. SE-751 89 Uppsala, Sweden phone. +46 18 67 40 00 fax. +46 18 30 91 62 e-mail. marie.sjolund@sva.se web. www.sva.se