Volume 9, Number 10—October 2003
Research
Escherichia coli O157 Exposure in Wyoming and Seattle: Serologic Evidence of Rural Risk
Jason P. Haack*, Srdjan Jelacic†, Thomas E. Besser‡, Edward Weinberger*†, Donald J. Kirk§, Garry L. McKee¶, Shannon M. Harrison¶, Karl J. Musgrave¶, Gayle Miller¶, Thomas H. Price*#, and Phillip I. Tarr*†
Table 3
Age, gender, and enzyme immunoassay (EIA) value distribution in rural Wyoming communities, including the median and range of optical densities (OD) for EIA readings
| Characteristics of populations | Afton (N=253) | Alpine (N=84) | Thayne (N=148) |
|---|---|---|---|
| Age (y) Mean (SD) Median (range) | 56 (15) 56 (16–92) | 55 (12) 56 (20–78) | 61 (14) 63 (16–92) |
| Male: female | 120:133 | 39:45 | 66:82 |
| OD (EIA units) Least squares mean Median (range) | 0.357 0.349 (0.192–1.115) | 0.340 0.343 (0.185–0.550) | 0.359 0.353 (0.230–0.643) |
| EIA, 80th percentile N+ (%) EIA, 90th percentile N+ (%) | 69 (27.3) 38 (15.0) | 11 (13.1) 5 (6.0) | 31 (20.9) 16 (10.8) |
