Volume 12, Number 11—November 2006
Research
Clostridium difficile PCR Ribotypes in Calves, Canada
Alexander Rodriguez-Palacios*
, Henry R. Stämpfli*, Todd Duffield*, Andrew S. Peregrine*, Lise A. Trotz-Williams*, Luis G. Arroyo*, Jon S. Brazier†, and J. Scott Weese*
, Henry R. Stämpfli*, Todd Duffield*, Andrew S. Peregrine*, Lise A. Trotz-Williams*, Luis G. Arroyo*, Jon S. Brazier†, and J. Scott Weese*
Table 1
Estimated odds ratios for a calf to have a positive toxin A/B ELISA result, southern Ontario, Canada, 2004*
| Pairwise comparison | Odds ratio | 95% CI | Adjusted Tukey p values |
|---|---|---|---|
| May vs August† | 3.62 | 1.8–8.3 | 0.007 |
| June vs August† | 3.17 | 1.3–7.7 | 0.029 |
| July vs August† | 2.58 | 1.2–5.5 | 0.038 |
| May vs July | 1.41 | 0.7–2.8 | 0.59 |
| June vs July | 1.23 | 0.6–2.6 | 0.85 |
| May vs June | 1.14 | 0.5–2.6 | 0.95 |
|
*CI, confidence interval. The number of positive toxin A/B ELISA test results and calves sampled per month was May, 23/57; June, 16/41; July, 34/105; and August, 12/75. August data include 2 observations from September.†Statistically significant. | |||
*CI, confidence interval. The number of positive toxin A/B ELISA test results and calves sampled per month was May, 23/57; June, 16/41; July, 34/105; and August, 12/75. August data include 2 observations from September.†Statistically significant.
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