Volume 8, Number 4—April 2002
Research
A Waterborne Outbreak of Escherichia coli O157:H7 Infections and Hemolytic Uremic Syndrome: Implications for Rural Water Systems 1
Sonja J. Olsen*
, Gayle Miller†, Thomas Breuer*, Malinda Kennedy*, Charles Higgins‡, Jim Walford†, Gary McKee†, Kim Fox#, William Bibb*, and Paul S. Mead*
, Gayle Miller†, Thomas Breuer*, Malinda Kennedy*, Charles Higgins‡, Jim Walford†, Gary McKee†, Kim Fox#, William Bibb*, and Paul S. Mead*Table 2
Univariate analysis of exposures in Alpine resident cohort study, Alpine, Wyoming, June–July 1998a
| Selected exposuresa | Proportion ill | Relative risk (95% CI) | |
|---|---|---|---|
| Exposed | Nonexposed | ||
| Played in sprinkler | 10/29 | 44/254 | 2.0 (1.1 - 3.5) |
| Played with water guns | 7/19 | 47/264 | 2.1 (1.1 - 3.9) |
| Serviced by municipal water at home | 45/192 | 9/92 | 2.4 (1.2 - 4.7) |
| Drank municipal watera | 8/211 | 3/68 | 5.2 (1.7 - 16.0) |
| Drank municipal water June 26-28b | 8/181 | 2/62 | 8.2 (2.1 - 32.8) |
| Venison consumption | 3/13 | 51/271 | 1.2 (0.4 - 3.4) |
| Elk consumption | 10/44 | 44/239 | 1.2 (0.7 - 2.3) |
| Jerky consumption | 4/25 | 49/256 | 0.8 (0.3 - 2.1) |
| Hamburger consumption | 29/147 | 21/111 | 1.0 (0.6- 1.7) |
| Pink hamburger consumption | 0/7 | 27/130 | undefined, p=0.2 |
aExcept when noted, all exposures refer to the period June 25 through July 1, 1998.
bOnly 8 (4%) of 211 persons who drank municipal water reported boiling it.
CI = confidence intervals.
