Table 2. Association between number of recipients of an individual cow and her disease phenotype, by scenario.
For phenotypes “shedding level”, “age at first shedding” and “infection progress”, Spearman’s rank correlation coefficients and (p values) are presented. For “serostatus”, mean number of recipients for both phenotype levels and (p values) of Welch’s two sample t test are presented (n = 57 cows).
| Disease phenotype | Scenarios | |||||
|---|---|---|---|---|---|---|
| [birth_Basic] | [birth_E] | [birth_S] | [shed_Basic] | [shed_E] | [shed_S] | |
| Shedding levela | 0.28 (0.04*) | 0.32 (0.02*) | 0.28 (0.04*) | 0.25 (0.06) | 0.27 (0.04*) | 0.24 (0.08) |
| Age at first sheddingb | -0.20 (0.14) | -0.33 (0.01*) | -0.29 (0.03*) | -0.30 (0.02*) | -0.29 (0.03*) | -0.28 (0.04*) |
| Infection progressc | 0.32 (0.06) | 0.38 (0.02*) | 0.28 (0.09) | 0.33 (0.06) | 0.34 (0.05*) | 0.26 (0.13) |
| Serostatusd | 1.0 / 1.7 (0.53) | 1.0 / 2.3 (0.25) | 1.1 / 2.1 (0.24) | 1.1 / 0.5 (0.07) | 0.9 / 0.9 (0.95) | 1.0 / 1.0 (0.93) |
*Good evidence against the null hypothesis of Spearman’s rank correlation coefficient = 0 at the significance level of p <0.05.
a Shedding level, levels: 0 –always faecal culture negative, 1—low, 2 –high.
b Age at first shedding, levels: 0 - ≤3 years, 1 - >3 years, 2—ante mortem negative.
c Infection progress, levels: 0—ante mortem negative, 1—non-progressor, 2 –progressor.
d Serostatus, levels: 0—ELISA-negative, 1—ELISA-positive.