Salmonella enterica in pork: Prevalence in the environment, carcasses and by-products in the slaughterhouse of a vertically integrated company (2001-2002)

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Stathopoulou, Evgenia
Genigeorgis, Constantin
Panoulis, Christos
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International Conference on the Epidemiology and Control of Biological, Chemical and Physical Hazards in Pigs and Pork
Iowa State University Conferences and Symposia

The SafePork conference series began in 1996 to bring together international researchers, industry, and government agencies to discuss current Salmonella research and identify research needs pertaining to both pig and pork production. In subsequent years topics of research presented at these conferences expanded to include other chemical and biological hazards to pig and pork production.


The study determined the prevalence of Salmonella spp., in the slaughterhouse environment, and products of a vertically integrated company in Crete. From 30/11/2001 to 11/6/2002 we visited the plant 7 times and collected 250 samples. The pigs originated from the company`s near by farm. During operations and after 75-100 pigs were processed we collected 185 samples. The prevalence of Salmonella spp in 4 visits was 9.09, 15.22, 6.38 and 2.13 % respectively. The prevalence in scalding tank overflow water, floors, workers’ hands, workers’ knives, livers tank, pork carcasses, livers, and tongue surfaces and ileoceacal lymph nodes and caecal contents samples was 14.2% (range: 0-50), 11.1% (0%-50%), 0%, 0%, 0%, 2.5% (0-10), 2.5% (0-20), 2.5% (0-20), 15% (0-40) and 35% (0-80) respectively. The prevalence in 3 visits and collection of 66 samples before the onset of operations was 22.7, 31.8 and 9.1 % respectively. The prevalence in the laraige area, the drains, cutting saw, knives, plastic door panels, workers aprons and offal baskets surfaces was 44.4% (range 0-67), 33.3% (20-40), 0%, 11.1% (0-33.3), 8.3% (0-33.3), 22.2% (0-33.3), and 11.1% (0-33.3) respectively. Only S.Infantis has been isolated. Caecal prevalence of 60-80% did not correlate with increased prevalence on carcasses and livers in the same sampling day. Isolated strains were resistant to Rifampin and Nitrofurantoin and sensitive to 35 other antimicrobials. Prudent use of antimicrobials mostly for therapeutic purposes was initiated in 1999. Rifampin and Nitrofurantoin have never been used.

Wed Jan 01 00:00:00 UTC 2003