Table 1 Geographical distribution of farms and samples included in this study
| Â | No. of farms | No. of samples (no. of samples examined by flotation) |
|---|---|---|
North-west | 9 | 200 (196) |
 Schleswig-Holstein | 1 | 16 |
 Lower Saxony | 3 | 55 |
 North-Rhine Westphalia | 5 | 129 |
South-west | 6 | 130 (125) |
 Hesse | 2 | 33 |
 Baden-Wuerttemberg | 4 | 97 |
North-east | 9 | 222 (201) |
 Mecklenburg-Vorpommern | 1 | 14 |
 Saxony | 6 | 166 |
 Thuringia | 2 | 42 |
South-east | 3 | 65 (65) |
 Bavaria | 3 | 65 |
Total | 27 | 617 (587) |