Table 1. Univariate analysis of Echinococcus coproantigen ELISA data from Welsh farm dogs and possible risk factors determined by questionnaire*.
| Risk factor | No. positive/negative for coproantigen† (N = 1,164) |
||||
|---|---|---|---|---|---|
| Present | Absent | OR | 95% CI | p value | |
| Farmer slaughters sheep | 11/54 | 83/1,016 | 2.49 | 1.26–4.95 | 0.007 |
| Stock euthanized because of FMD | 20/255 | 74/815 | 0.86 | 0.52–1.44 | 0.576 |
| FMD-affected farm | 8/89 | 85/975 | 1.03 | 0.48–2.2 | 0.937 |
| Dog free roaming | 69/504 | 22/519‡ | 3.23 | 1.97–5.3 | <0.0001 |
| No disease knowledge | 24/230 | 70/840 | 1.25 | 0.77–2.04 | 0.364 |
| Dosing interval every 4–6 mo | 63/554 | 18/434§ | 2.7 | 1.6–4.7 | <0.0001 |
| Dosing interval >6 mo | 13/81 | 18/434§ | 3.87 | 1.83–8.21 | <0.0001 |
| Dog sex (male) | 43/543 | 50/526 | 0.83 | 0.55–1.27 | 0.4 |
| Age of dog ≤5 y | 63/602 | 30/467 | 1.63 | 1.04–2.56 | 0.033 |
| Food: scraps or offal | 18/122 | 76/947¶ | 1.84 | 1.06–3.18 | 0.027 |
*Sampled in Powys and Gwent, Wales, United Kingdom, July–November 2002. ELISA, enzyme-linked immunosorbent assay; OR, odds ratio; CI, confidence interval; FMD, foot and mouth disease. †By enzyme-linked immunosorbent assay. ‡Dog chained up. §Dosing <4 months. ¶Boiled food.