Table 2.
Seasonality of STEC O157 and non-O157 STEC by watershed.
| Watershed(s) | STEC O157 prevalence ± SD1 | P2 | Non-O157 STEC prevalence ± SD | P2 | ||
|---|---|---|---|---|---|---|
| Summer-Fall | Winter-spring | Summer-fall | Winter-spring | |||
| All | 4.3 ± 4.1% | 11 ± 14% | 0.027 | 12 ± 7% | 10 ± 7% | 0.407 |
| Gabilan | 12 ± 5%a3 | 26 ± 6%a | 0.032 | 13 ± 5%a | 22 ± 4%a | 0.050 |
| Salinas River | 4.2 ± 7%a | 5 ± 9%b | 0.904 | 22 ± 19%a | 12 ± 16%ac | 0.026 |
| Tembladero | 4.8 ± 14%a | 12 ± 25%b | 0.220 | 1.6 ± 5%b | 3.5 ± 11%b | 0.676 |
| Alisal | 1.1 ± 5%b | 7.8 ± 16%b | 0.034 | 16 ± 18%a | 10 ± 15%bc | 0.185 |
| Carr Lake | 1.5 ± 5%b | 12 ± 22%b | 0.029 | 4 ± 19%b | 4.7 ± 12%b | 0.64 |
| P | 0.009 | 0.013 | <0.001 | <0.001 | ||
1
SD, standard deviation.
2
P-values in this column were calculated from the data in the corresponding row.
3
Lower case letters indicate statistical groupings within a column (for the different watersheds only). Shared letters indicate no statistical difference.