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Association of the number of virulence genes and the proportion of animal and human S. aureus strains
| No. of virulence genes | No. of animal strains (n = 77) | No. of human strains (n = 168) | P | Odds ratio | 95% Confidence interval |
|---|---|---|---|---|---|
| 2 | 0 | 5 | 0.33 | 0.19 | 0.01-3.5 |
| 3 | 3 | 14 | 0.28 | 0.45 | 0.1-1.6 |
| 4 | 17 | 41 | 0.75 | 0.9 | 0.5-1.7 |
| 5 | 39 | 80 | 0.68 | 1.1 | 0.7-1.9 |
| 6 | 15 | 27 | 0.58 | 1.3 | 0.6-2.5 |
| 7 | 3 | 1 | 0.09 | 6.77 | 0.7-66.2 |
