[Intestinal parasites infection of horses from riding clubs in Kraków area].

The studies were carried out in 2001 and 2002 on horses from riding clubs in Krakow area. On the basis of McMaster method EPG (eggs per gram) and prevalence of infection (%) was evaluated. The most common parasites were strongyles (Strongylidae). In the first year of study in dynamics of strongyles eggs output of horses kept on paddocks two peaks were observed: in May (450 EPG) and January (427 EPG), in comparison with horses under pasture system where the highest level of strongyles eggs output were in May (832 EPG), from August (420 EPG) to October (385 EPG) and in March (482 EPG). In the second year of study seasonal mean prevalence (from April to October) as well as EPG were higher in horses under pasture system (73.9% and 781 EPG) than in horses on paddocks with grass (42.1% and 251 EPG) and horses on paddocks without grass (19.2% and 157 EPG).