TABLE. Number of exposures to selected food, water, and animals, and matched odds ratios comparing patients with primary cases of Shiga toxin–producing Escherichia coli O157:H7 infection (n = 6) with healthy children (n = 16) — Centennial Park/Colorado City/Hildale community, Arizona and Utah, June–July 2017.
| Exposure | Case-patients no. (%) | Controls no. (%) | Matched odds ratio (95% CI) |
|---|---|---|---|
| Played in area with animal manure |
4 (67) |
3 (19) |
7.7 (0.8–71.3) |
| Touched cow |
2 (33) |
1 (6) |
5.3 (0.5–58.7) |
| Dogs wandered on property |
4 (80) |
7 (44) |
4.1 (0.4–38.0) |
| Drank municipal water |
3 (50) |
3 (19) |
3.1 (0.5–19.3) |
| Swimming |
5 (83) |
10 (63) |
2.4 (0.3–21.3) |
| Consumed beef prepared at home |
3 (50) |
12 (75) |
0.3 (0.03–2.8) |
| Consumed watermelon* | 5 (100) | 10 (63) | — |
Abbreviation: CI = confidence interval.
* Only five of the six case-patients responded to the question on watermelon.