Volume 18, Number 9—September 2012
Dispatch
Yersinia enterocolitica Outbreak Associated with Ready-to-Eat Salad Mix, Norway, 2011
Table
Results from univariate conditional logistic regression analyses of a Yersinia enterocolitica outbreak, Norway, February–April 2011
Exposure | No. cases, n = 9 | No. controls, n = 26* | Matched odds ratio† (95% CI) | p value |
---|---|---|---|---|
Ready-to-eat salad mix | 6 | 3 | 13.7 (1.6–116.3) | 0.02 |
Diced ham, ham pieces | 5 | 3 | 6.3 (1.2–32.9) | 0.03 |
Chicken breast | 8 | 9 | 10.0 (1.2–83.6) | 0.03 |
Arugula | 7 | 8 | 9.8 (1.2–83.6) | 0.04 |
Pork chops | 4 | 3 | 8.4 (0.9–78.6) | 0.06 |
Bean sprouts | 3 | 1 | 8.2 (0.8–79.3) | 0.07 |
Sugar peas | 6 | 8 | 3.7 (0.9–16.1) | 0.08 |
Iceberg lettuce | 8 | 13 | 6.6 (0.8–57.5) | 0.09 |
*n = 25 for ready-to-eat salad mix.