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Pediculicide resistance

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

  • if both adult and young lice are both present 24 hours after the application of a pediculicide then a diagnosis of resistance is made

  • if only young lice are detected then this does not indicate resistance because some eggs may still hatch out after use of insecticide

  • if only old lice are seen then this represents reinfestation

  • there have been reports of resistance to malathion, permethrin and phenothrin in some parts of the country

  • check local guidelines regarding prescribing guidance

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