Fig. 2

The number of herds harbouring GIN populations resistant to benzimidazoles (BZ), macrocyclic lactones (ML), and levamisole (LEV) in which larvae developed in control wells (C) and in tested wells (T) at the discriminating concentration (DC). Anthelmintic resistance was classed as mild (< 10% of larvae developed at the DC), moderate (10–50% of larvae), and severe (> 50% of larvae). Letter “n” stands for the number of herds infected with a relevant GIN