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Table 6 Samples from 90 wild boars analysed by PCR for the presence of Y. enterocolitica, Y. pseudotuberculosis and Salmonella spp.

From: Distribution of enteropathogenic Yersinia spp. and Salmonella spp. in the Swedish wild boar population, and assessment of risk factors that may affect their prevalence

  OR for the presence of
Any enteropathogen (n* = 55) Y. enterocolitica (n* = 28) Salmonella spp. (n* = 24) Y. pseudotuberculosis (n* = 20)
High population density (> 30 harvested/10 km2, n# = 51) 0.80 (0.34–1.89) 0.33 (0.07–1.62) 0.61 (0.15–2.53) 2.83 (0.93–8.65)
P = 0.0672
High frequency of artificial feeding places (> 5 feeding places/10 km2, n# = 39) 0.85 (0.36–2.01) 0.24 (0.04–1.33) 1.08 (0.23–4.98) 2.39 (0.87–6.60)
P = 0.0929
Well established population (> 10 years, n# = 69) 0.28 (0.07–1.11)
P = 0.0693
0.20 (0.03–1.19)
P = 0.0769
0.27 (0.07–1.05)
P = 0.0591
1.28 (0.38–4.37)
Poor handling of slaughter waste (n# = 32) 1.12 (0.46–2.71) 0.73 (0.24–2.23) 0.50 (0.10–2.46) 2.67 (0.81–8.81)
  1. The odds ratio for individual’s being positive by PCR for each of the risk factors was calculated using the positive individuals as cases and the negative individuals as controls. Confidence intervals are given within brackets. The analysed risk factors were population density, frequency of artificial feeding places, age of population and handling of slaughter waste. All associations with P < 0.1 are presented in italic and with the associate P-value
  2. * Number of positives
  3. #Number of individuals within this risk factor category