Table 1. Prevalence of D. dendriticum per years.
| Year | Prevalence |
| 2005 | 0.34 (0.28–0.40) |
| 2006 | 0.62 (0.54 –0.70) |
| 2007 | 0.32 (0.26–0.37) |
| 2008 | 0.78 (0.69–0.87) |
| Total prevalence | 0.61 (0.53–0.69) |
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