Table 1 The GEE parameter estimates, 95% confidence limits and odds ratios for the prevalence of viremia measured by PCR, seropositive measured by CIEP and IAT positive results in the blood from day 31 to 451 post-inoculation

 Treatment

1.82 (0.40)

1.09 (0.58)

1.49 (0.48)

1.06 (0.58)

 Sampling days

52.71 (< 0.01)

4.79 (0.03)

0.26 (0.61)

10.16(< 0.01)

 Treatment X days

1.29 (0.52)

3.01 (0.21)

2.01 (0.37)

0.32 (0.85)

 1.5% kelp

−0.233 (−1.24, 0.77)

−0.110 (− 1.78,1.56)

−0.220 (− 1.17, 0.73)

−0.031 (− 0.76,0.70)

 0.75% kelp

− 0.376 (− 1.247, 0.56)

−0.424 (− 2.08,1.23)

−0.624 (− 1.54, 0.29)

−0.470 (− 1.23, 0.29)

 0% kelp

Reference

Reference

Reference

Reference

 Sampling days

−1.811 (−2.29,-1.33)

0.120 (−0.01, 0.25)

0.028 (−0.21, 0.26)

− 0.185 (− 0.30, − 0.07)

 0.75–1.5%

0.866 (0.28–2.65)

0.731 (0.16–3.25)

0.668 (0.27–1.64)

0.644 (0.30–1.39)

 0.75–0%

0.686 (0.27–1.75)

0.655 (0.13–3.42)

0.536 (0.21–1.34)

0.625 (0.29–1.33)

 1.5–0%

0.792 (0.29–2.16)

0.896 (0.17–4.74)

0.803 (0.31–2.07)

0.969 (0.47–2.01)

Sampling days^b

0.163 (0.10–0.26)

1.127 (0.98–1.28)

1.028 (0.81–1.30)

0.831 (0.74–0.93)