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Assessment of risk factors for a high within-batch prevalence of Yersinia enterocolitica in pigs based on microbiological analysis at slaughter

Gerty Vanantwerpen (UGent) , Dirk Berkvens (UGent) , Inge Van Damme (UGent) , Lieven De Zutter (UGent) and Kurt Houf (UGent)
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Abstract
The purpose of the current study was to find farm-level factors influencing the bacteriological prevalence of Yersinia enterocolitica in pigs at time of slaughter. On 100 farms, data concerning a broad range of farm aspects (e.g., management and housing system, biosecurity, and hygiene measurements) were collected using a face-to-face questionnaire. At the slaughterhouse, tonsils of on average 70 slaughter pigs per batch were sampled to determine the infection status of pigs. After univariable mixed-effect logistic regressions, variables that were related to the Yersinia prevalence (p<0.05) were included in a multivariable model. In this model, the factors remaining positively associated with a higher Y. enterocolitica carriage in the tonsils (p<0.1) were an increasing number of piglet suppliers, a high density of pig farms in the area, and the use of semislatted floors in the fattening pig unit. The proper use of a disinfection bath before entering the stables and a poor biosecurity level were protective factors, although a higher prevalence was associated with a significant positive interaction between the presence of pets in the stables and a poor biosecurity level. Reducing the number of piglet suppliers, using a disinfection bath properly, and prohibiting pets inside the stables could be easily implemented by pig farmers to lower the prevalence of Y. enterocolitica in pigs at slaughter.
Keywords
HERD LEVEL, FINISHING PIGS, PSEUDOTUBERCULOSIS, FARMS, TRANSMISSION, TONSILS, CHAIN, PORK

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Chicago
Vanantwerpen, Gerty, Dirk Berkvens, Inge Van Damme, Lieven De Zutter, and Kurt Houf. 2015. “Assessment of Risk Factors for a High Within-batch Prevalence of Yersinia Enterocolitica in Pigs Based on Microbiological Analysis at Slaughter.” Foodborne Pathogens and Disease 12 (7): 571–575.
APA
Vanantwerpen, G., Berkvens, D., Van Damme, I., De Zutter, L., & Houf, K. (2015). Assessment of risk factors for a high within-batch prevalence of Yersinia enterocolitica in pigs based on microbiological analysis at slaughter. FOODBORNE PATHOGENS AND DISEASE, 12(7), 571–575.
Vancouver
1.
Vanantwerpen G, Berkvens D, Van Damme I, De Zutter L, Houf K. Assessment of risk factors for a high within-batch prevalence of Yersinia enterocolitica in pigs based on microbiological analysis at slaughter. FOODBORNE PATHOGENS AND DISEASE. 2015;12(7):571–5.
MLA
Vanantwerpen, Gerty, Dirk Berkvens, Inge Van Damme, et al. “Assessment of Risk Factors for a High Within-batch Prevalence of Yersinia Enterocolitica in Pigs Based on Microbiological Analysis at Slaughter.” FOODBORNE PATHOGENS AND DISEASE 12.7 (2015): 571–575. Print.
@article{5961564,
  abstract     = {The purpose of the current study was to find farm-level factors influencing the bacteriological prevalence of Yersinia enterocolitica in pigs at time of slaughter. On 100 farms, data concerning a broad range of farm aspects (e.g., management and housing system, biosecurity, and hygiene measurements) were collected using a face-to-face questionnaire. At the slaughterhouse, tonsils of on average 70 slaughter pigs per batch were sampled to determine the infection status of pigs. After univariable mixed-effect logistic regressions, variables that were related to the Yersinia prevalence (p{\textlangle}0.05) were included in a multivariable model. In this model, the factors remaining positively associated with a higher Y. enterocolitica carriage in the tonsils (p{\textlangle}0.1) were an increasing number of piglet suppliers, a high density of pig farms in the area, and the use of semislatted floors in the fattening pig unit. The proper use of a disinfection bath before entering the stables and a poor biosecurity level were protective factors, although a higher prevalence was associated with a significant positive interaction between the presence of pets in the stables and a poor biosecurity level. Reducing the number of piglet suppliers, using a disinfection bath properly, and prohibiting pets inside the stables could be easily implemented by pig farmers to lower the prevalence of Y. enterocolitica in pigs at slaughter.},
  author       = {Vanantwerpen, Gerty and Berkvens, Dirk and Van Damme, Inge and De Zutter, Lieven and Houf, Kurt},
  issn         = {1535-3141},
  journal      = {FOODBORNE PATHOGENS AND DISEASE},
  language     = {eng},
  number       = {7},
  pages        = {571--575},
  title        = {Assessment of risk factors for a high within-batch prevalence of Yersinia enterocolitica in pigs based on microbiological analysis at slaughter},
  url          = {http://dx.doi.org/10.1089/fpd.2014.1897},
  volume       = {12},
  year         = {2015},
}

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