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Number of reindeer and the prevalence of S. tundra microfilariae in the ivermectin and control groups 44 days after ivermectin injections (200 μg/kg b.w. s.c.) in winter ivermectin trial.
| Group | Ivermectin | Control | p-value (chi) |
| Calves (n) Smf prev. |
22 14% |
20 95% |
p < 0.001 |
| Adults (n) Smf prev. |
78 1% |
80 34% |
p < 0.001 |
| Total (n) Smf prev. |
100 4% |
100 36% |
p < 0.001 |
