Intoxication of <i>Caenorhabditis elegans</i> free-living fourth-stage larvae (L4) using five doses of albendazole (ALB), ivermectin (IVM), nitazoxanide (NTZ), or pyrantel (PYR).

<p>For comparative reference, the molar concentration of each drug at 1000 µg/mL is indicated. Roundworms were scored daily for motility. Any motility, including motility after prodding, was counted as “alive.” Lack of motility, including a lack of a response after prodding, was counted as “dead.” Data are the combination of three independent trials with ~10 nematodes/trial.