<prompt> Single-dose mebendazole is effective in treatment ofEnterobius vermicularisAnkylostoma duodenaleAscaris lumbricoidesAll of the above  <response>: Ans. a Enterobius vermicularis Ref. Nelson paediatrics 18th p. 1450; KDT Pharmacology 6th809Enterobius: 100 mg single dose mebendazole, repeated after 2-3 weeks.Round worm:Hookworm:Mebendazole 100 mg twice a day for 3 consecutive days.Whipworm:NO fastingpurgingother preparation needed.Enterobius vermicularis pinworm infection; Drug of choice adult as well pediatric dosage Pyrantel pamoate 11 mgkg base once max 1 g; repeat in 2 wk OR Mebendazole 100 mg once,repeat in 2 wk OR Albendazole 400 mg once; repeat in 2 wk.Ascariasis Ascaris lumbricoides. roundworm; Drug of choice Albendazole 400 mg once OR Mebendazole 100 mg bid x 3 days or 500 mg once OR Ivermectin 150-200 microgkg once 