Table 5.
The mean percentage prevalence of each of the major nematode species present in tracer lambs.
| Group | Year | % Teladorsagia circumcincta | % Nematodirus battus | % Nematodirus filicollis | % Trichostrongylus vitrinus | Others⁎ |
|---|---|---|---|---|---|---|
| NST | 2006 | 42.4 | 38.0 | 4.3 | 13.2 | 2.2 |
| 2007 | 12.4 | 74.6 | 4.0 | 3.9 | 5.2 | |
| 2008 | 18.2 | 81.5 | 0.0 | 0.4 | 0.0 | |
| 2009 | 28.0 | 62.8 | 6.0 | 0.9 | 2.3 | |
| 2010 | 26.0 | 66.5 | 3.0 | 0.0 | 4.4 | |
| TST | 2006 | 38.9 | 18.7 | 4.1 | 37.7 | 0.6 |
| 2007 | 19.4 | 46.1 | 4.6 | 28.7 | 1.2 | |
| 2008 | 12.2 | 73.5 | 5.3 | 8.9 | 0.0 | |
| 2009 | 24.9 | 52.8 | 5.8 | 13.4 | 3.1 | |
| 2010 | 20.8 | 51.3 | 2.1 | 21.1 | 4.7 | |
| SPT | 2006 | 31.1 | 23.9 | 3.3 | 36.9 | 4.9 |
| 2007 | 22.9 | 38.8 | 6.2 | 31.7 | 0.4 | |
| 2008 | 9.6 | 79.2 | 2.4 | 8.8 | 0.1 | |
| 2009 | 56.5 | 32.5 | 1.2 | 2.5 | 7.3 | |
| 2010 | 26.0 | 52.7 | 4.5 | 14.7 | 2.1 | |
| MT | 2006 | 25.2 | 47.7 | 5.8 | 18.5 | 2.9 |
| 2007 | 21.8 | 63.5 | 6.7 | 7.6 | 0.5 | |
| 2008 | 5.1 | 74.3 | 2.0 | 18.4 | 0.2 | |
| 2009 | 45.3 | 33.8 | 1.1 | 9.2 | 10.5 | |
| 2010 | 18.7 | 49.2 | 3.3 | 24.8 | 3.9 | |
⁎
Others are composed of Teladorsagia trifucata, Trichostrongylus axei, Nematodirus helvetianus, Trichostrongylus colubriformis and Cooperia spp.