the two published EU directives (2001, 2006) which aim at performing diagnostic steps before treatment and reducing the use of drugs. Highly relevant are the findings that on average more than 40% of adult horses (>4 years) either do not show any strongyle egg output at all, or egg counts below the defined treatment threshold level of 200 EpG, i. e. the number of anthelmintic treatments could be significantly reduced. On some farms the reduction was more than 60% when compared to the previous strategic treatment schedules, since only those horses are treated which considerably contribute to the pasture contamination. Furthermore, the number of horses which had to be treated in the 2nd year of SAT according to the threshold level e significantly decreased in a specifically designed study, suggesting that the number of treatments can possibly be further reduced with time. An appropriate SAT procedure includes at the same time the evaluation of the prevalence of Strongylus vulgaris and the status of AR, resp. In-depth spectrum analyses in Germany and Switzerland revealed S. vulgaris prevalences of < 2%. Preliminary results show that horses < 4 years cannot be treated according to the same schedule. However, preliminary data from monitoring programs on stud/foal keeping farms provide some indications that a SAT approach might be possible when considering a different threshold level, the occurrence of P. equorum and the additional work for sample collection. Analyzing more than 2500 fecal samples from 303 horses has clearly shown the existence of a repeatability of fecal egg counts (FEC) over time by the identification of so-called high and low egg-shedders. Statistical analyses have proven a significant within-horse-repeatability. This further supports the idea that FECs can be used as a solid basis for resulting treatment decisions in adult horses.