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Selected Publication:

Publication type: Doctoral Thesis

Year: 2014

Author(s): Kostenzer, Klaus

Title: Grundlagen der Kontrolle von Salmonella spp. in Geflügel- und Schweinebeständen in Österreich.

Other title: Fundamentals of the control of Salmonella spp. in poultry and pigs in Austria

Source: Dissertation, Vet. Med. Univ. Wien, pp. 80.


Advisor(s):

Köfer Josef

Reviewer(s):
Hess Michael

Vetmed Research Units:
Institute of Food Safety, Food Technology and Veterinary Public Health, Unit of Veterinary Public Health and Epidemiology


Graduation date: 14.03.2014


Abstract:
In order to properly assess the significance of Salmonella spp. in Austria and the EU and to set corresponding targets, mandatory baseline surveys were conducted and the prevalence in various animal populations was determined in all Member States. From October 2004 to December 2008, these studies were carried out in different populations of poultry and pigs. The results and the implementation of these surveys in turkeys, slaughter and breeding pigs are herein discussed. In combination with the analyses done by EFSA the prevalences relating to the Austrian livestocks were analysed. In turkeys a total of 202 turkey fattening flocks in 104 holdings were sampled between October 2006 and September 2007. A prevalence of Salmonella spp. of 17,3 % (n = 35) of the flocks and 25 % (n = 26) of holdings has been obtained. Regarding the most important serovars for human health, S. Enteritidis were not identified in any single flock and S. Typhimurium was only found once. In fattening pigs a total of 647 pigs were sampled in the same period in 28 Austrian slaughterhouses. Samples were taken from both the ileocaecal lymphnodes to determine the Salmonella infection of the animals as well as from swabs from the carcass surface to determine contamination. Based on the results of 617 carcasses a prevalence of 2 % of the pigs in the lymph nodes, and 1,1 % was levied on the carcass surface. S. Derby, S. Enteritidis and S. Typhimurium were the three most frequently isolated serovars. With breeding pigs 252 establishments were examined in Austria in another study from January to December 2008. Faecal samples were drawn from nucleus herds, breeding herds and mixed multiplying herds. Prevalence of 5,8 %, 5,3 % and 9,1 % were obtained, with mostly S. Typhimurium isolated. In summary compared with other Member States and neighbouring countries of Salmonella spp. a low prevalence has been documented for Austrian livestock populations – especially for fattening pigs. The serovars initially covered by the national control programmes now play a subordinate role. In poultry looking at the serovar distribution the main chain of infection is probably the entry via parent flocks and the feed. In contrast, the results for fattening pigs show a very positive situation. Other studies show that for Austria the serovars most relevant for human health - S. Enteritidis and S. Typhimurium - play a predominant role in laying hens. Pigs, turkeys and broilers are secondary for the risk of human infections. Overall the stringent control measures in laying flocks in the recent years led to the most significant decrease in Salmonella infections in humans in Austria.


Publication(s) resulting from University thesis:

Kostenzer, K; Much, P; Kornschober, C; Lassnig, H; Köfer, J (2014): [Implementation and results of the EU-wide baseline studies on the prevalence of Salmonella spp. in slaughter and breeding pigs in Austria]. Berl Munch Tierarztl Wochenschr. 2014; 127(1-2):35-42

Kostenzer, K; Lassnig, H; Schliessnig, H; Kornschober, C; Much, P; Köfer, J (2013): [Implementation and results of the EU-wide baseline study on the prevalence of Salmonella spp. in flocks of turkeys in Austria]. Berl Munch Tierarztl Wochenschr. 2013; 126(9-10):401-407

Lassnig, H; Much, P; Schliessnig, H; Osterreicher, E; Kostenzer, K; Kornschober, C; Köfer, J (2012): Prevalence of Salmonella spp. in Austrian broiler flocks in the context of the EU-wide baseline survey 2005-2006. Berl Munch Tierarztl Wochenschr. 2012; 125(3-4):129-137

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