Table 1.

Data on foals/studs sampled in the study.

Farm id	Age (wks) at 1stAH treat	No AH treat 1styear	AH used prior to study	Number of foals sampled	% inf P. equorum d 0
1	8	6	pyr	15	60
2	8	3	iv	19	37
3	6	6	iv	17	47
4	6	7	iv	23	52
5	8	6	fbz	14	43
6	4	5	iv	18	56
7	8	6	iv	19	84
8	1	5	iv	22	41
9	8	6	iv + pyr	18	11
Overall				165	48

Wks - weeks; AH - anthelmintic; treat - treatment; inf - infected; d 0 - the day of AH treatment.