Table 1 Number of BTB herd breakdowns in each year, breakdowns characteristics and infected herds characteristics, Co. Donegal, September 1997 to August 2002, Ireland
From: A case study of bovine tuberculosis in an area of County Donegal, Ireland
| Â | Â | During each year of the study | Â | ||
|---|---|---|---|---|---|
| Â | 1st year | 2nd year | 3rd year | 4th year | 5th year |
| Â | Sept 97-Aug 98 | Sept 98-Aug 99 | Sept 99-Aug 00 | Sept 00-Aug 01 | Sept 01-Aug 02 |
Overall | Â | Â | Â | Â | Â |
Total number of BTB breakdowns | 14 | 9 | 18 | 9 | 32 |
   Number of breakdowns with at least one standard reactor | 12 | 8 | 16 | 9 | 28 |
   Number of breakdowns with at least one |  |  |  |  |  |
   animal with detected lesion(s) | 4 | 5 | 5 | 4 | 19 |
   Number of breakdowns that were eligible for an ER76 |  |  |  |  |  |
   investigation (with at least two standard reactors and a lesion) | 5 | 6 | 6 | 5 | 21 |
Per breakdown | Â | Â | Â | Â | Â |
Median herd size | 24 | 22 | 26.5 | 25 | 22 |
Median number of reactors | 1 | 1 | 1 | 1 | 1 |
   Median number of standard reactors | 1 | 1 | 1 | 1 | 1 |
   Median number of animals with detected BTB lesion(s) | 0 | 1 | 0 | 0 | 0.5 |
Days since the last full herd test | 403 | 359 | 364 | 379 | 336 |