Intoxication of <i>Ascaris</i><i>suum</i> fourth-stage larvae (L4) <i>in</i><i>vitro</i> 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. Parasites were scored daily for motility. Any motility, including motility after prodding, was counted as “alive.” Lack of motility, including lack of a response after prodding, was counted as “dead.” Data are the combination of three independent trials with 10 parasites/trial.