Effects of purified condensed tannin fractions on motility of Oesophagostomum dentatum fourth-stage larvae. Inhibition of O. dentatum L4 motility by derived F2 fractions from A) Hazelnut skin, B) white clover flowers, C) blackcurrant leaves, D) willow bark and E) Tilia flowers. Results are mean of two independent experiments, each performed in triplicate. Concentrations refer to the amount of CT in each fraction. IVM - 50 μg/mL ivermectin.