A total of 504 bovine faecal samples collected from intensively managed beef farms in Afyon province of Turkey were examined to determine the types and prevalence of coccidian parasites present. Coccidian oocysts were found in 20.04% of all the samples examined by sucrose-flotation. The species detected and their prevalence were Eimeria bovis (34.55%), E. auburnensis (23.03%), E. canadensis (14.55%), E. brasiliensis (10.91%), E. zuernii (6.67%), E. bukidnonensis (3.03%), E. cylindrica (2.42%), E. ellipsoidalis (1.21%), E. illinoisensis (1.21%), E. alabamensis (1.21%) and Isospora sp. (1.21%). Mixed infections of two to four species were found in 43.6% of the animals. The overall prevalence of coccidial oocysts in faecal samples was 27.23% for calves, 15.65% for cows. Linear regression analysis showed that there is a significant reduction in the OPG (the number of oocysts per gram of feces) levels (P < 0.05) in cows infected with Eimeria. No cases of clinical coccidiosis were observed in this survey. © 2007 Springer-Verlag.