Table 6.
Samples from 90 wild boars analysed by PCR for the presence of Y. enterocolitica, Y. pseudotuberculosis and Salmonella spp.
| 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) |
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
* Number of positives
#Number of individuals within this risk factor category