What advice should I provide to parents regarding hygiene measures to prevent threadworm reinfection in children?

Guideline-aligned answer with reasoning, red flags and references. Clinically reviewed by Dr Kola Tytler MBBS CertHE MBA MRCGP.

Posted: 16 August 2025 Guideline-Aligned (High Confidence) Clinically Reviewed
Dr Kola Tytler MBBS CertHE MBA MRCGPClinical Lead • iatroX

To prevent reinfection of threadworm in children, parents should be advised on rigorous hygiene measures, which should be followed for 2 weeks if the child has been treated with an anthelmintic like mebendazole, or for 6 weeks if hygiene measures are being used alone .

  • Hand Hygiene: Parents and children should wash hands thoroughly with soap and warm water after using the toilet, changing nappies, and before handling food .
  • Nail Care: Fingernails should be cut regularly, and children should be encouraged to avoid biting their nails and scratching around the anus .
  • Daily Washing: Children should shower each morning, ensuring the perianal area is included, to help remove any eggs from the skin .
  • Laundry: Bed linen and nightwear should be changed daily for several days after treatment . It is important not to shake out items, as this can distribute eggs around the room . Washing and drying items in a hot cycle will kill threadworm eggs .
  • Household Cleaning: The home should be thoroughly dusted and vacuumed, including mattresses . The bathroom should be cleaned by 'damp-dusting' surfaces, and the cloth used should be washed frequently in hot water .
  • Reinforcement: If infection recurs, it is usually due to reinfection, not treatment failure, so reinforcing the importance of strict hygiene measures is crucial .

Educational content only. Always verify information and use clinical judgement.