Title:A sertésdizentéria elleni védekezés gazdasági jelentősége
Summary Background: Swine dysentery is an infectious disease that affects growing and fattening pigs, causing severe bloody diarrhoea and haemorrhagic colitis, and often occurs worldwide including Hungary. Swine dysentery cause significant economic losses which are associated with high mortality and medication cost, and poor average daily gain (ADG), feed conversion ratio (FCR) and lean meat ratio after infection. Objectives: The aim of the study was to briefly present the clinical symptoms and the ways of prophylaxis of the disease with special regard to the effective antibiotics, and to economically analyse the metaphylactic antibiotic treatment of swine dysentery in Hungarian fattening pig herds. Materials and Methods: Based on international literature data partial budget calculation was used to assess the financial benefits of a 5 days long metaphy lactic antibiotic treatment of swine dysentery in a herd with 10,000 finishing pigs by using average Hungarian production and price data of 2016. Results and Discussion: The most effective prophylactic approach of swine dysentery is to avoid the introduction of Brachyspira hyodysenteriae into the herd by implementing good biosecurity measures. If the swine herd got infected with the pathogen an effective metaphylactic treatment could greatly decrease the detrimental production effects of the disease. In swine dysentery infected herds an effective metaphylactic antibiotic treatment would result in 3.1% increase in ADG, 28.5% decrease in mortality rate and 0.33% reduction in FCR on average in the finishing phase compared to a herd without swine dysentery control. The estimation predicts about €90,000 extra gross margin (income over feed cost) on herd level in a year and more than €2.5 extra gross margin per finished pig. If the treatment cost was less than €2.5 per finished pig the farmer would be better off.