Table 2 General data of 484 horses from 48 farms included in the study

Age (years; median range)

12.0 (0.8–34.0)

Mares (%)

50.2

Geldings (%)

46.7

Stallions (%)

3.1

Faecal samples (%)

100

Saliva samples (%)

75.4

Serum samples (%)

99.4

Last treatment

 Ivermectin + Praziquantel (%)

7.2

 Ivermectin (%)

42.4

 Moxidectin (%)

4.1

 Doramectin (%)

1.4

 Fenbendazole (%)

4.3

 Pyrantel (%)

38.2

 Unknown

2.3

Period between last anthelmintic treatment and sampling (weeks; median range)

14.4 (1.4–100.0)

Horses sampled per farm (number; median, range)

10 (4–17)

Pasture access (%)

96.7

Unlimited (%)

28.9

Limited (%)

67.8

Pasture area/horse (ha) (mean, range)

0.6 (0.1–2.0)

Size/number of horses per farm (mean, range)

40.2 (6–110)

Foals present (%)

39.6

Treatment schedule (annual)

 Selective (%)

8.7

 Low number (1–2) of treatments (%)

32.8

 Moderate number (3) of treatments (%)

39.6

 High number (≥4) treatments (%)

18.9