Threadworm infection

Threadworm (or pinworm) (Enterobius vermicularis) infection is not usually associated with co-infection with other helminths.

To treat Enterobius vermicularis, use:

1mebendazole 100 mg (child 10 kg or less: 50 mg) orally, as a single dosemebendazolemebendazolemebendazole

OR

1pyrantel (adult and child) 10 mg/kg up to 1 g orally, as a single dose. For dosage adjustment in adults with kidney impairment, see pyrantel dosage adjustmentpyrantelpyrantelpyrantel

OR

1albendazole orally, as a single dosealbendazolealbendazolealbendazole

adult: 400 mg. For dosage adjustment in adults with kidney impairment, see albendazole dosage adjustment

child 6 months or older and 10 kg or more: 400 mg

child 6 months or older and less than 10 kg: 200 mg.

Mebendazole, pyrantel and albendazole are equally effective in the treatment of Enterobius vermicularis, but albendazole has a broader spectrum and is only available with a prescription.

Due to the frequency of reinfection and autoinfection, consider repeating the dose after 2 weeks. Treat household contacts and carers at the same time to reduce the risk of reinfection. Provide advice on hygiene measures to reduce the risk of reinfection and spread of infection: wash hands regularly, avoid scratching around the anus, keep fingernails short, take a shower or bath daily, and wash clothing, towels and bed linen in hot water.