A SURVEY OF ANTHELMINTIC RESISTANCE IN SLOVAKIA

A survey of prevalence of anthelmintic resistant nematode strains was carried out in 77 sheep farms in the Slovak Republic. An egg hatch ass ay was used for the detection of resistance to the benzimidazole group of anthelmintics. Results could not be obtained from five farms becau se of low egg counts in faecal samples. On 64 farms, the effective dos e (ED50) values were under 0.1 mug ml-1 while on six farms, trichostro ngylid populations with resistance to benzimidazoles were found. Their ED50 values ranged from 0.10 to 0.12 mug ml-1.