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Peer-reviewed veterinary case report

Dog itching from biting lice cured with 1-month fluralaner treatment

By Smith, Lydia·Published in Journal of the American Animal Hospital Association·2026·View original on PubMed

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Original publication title: Successful Treatment of Trichodectes canis in a Dog with a 1-Month Formulation of Fluralaner.

Species:
dog

Plain-English summary

An 11-year-old spayed female Lhasa Apso was brought in for severe itching that wouldn't go away. The vet found that she had an infestation of biting lice. She was treated with a single dose of fluralaner, a medication that targets parasites. After two weeks, all adult lice were gone, and by four weeks, the itching had stopped completely, and there were no signs of lice left. This shows that fluralaner is effective against biting lice in dogs, even at a lower dose.

People also search for: dog itching treatment · Lhasa Apso lice infestation · fluralaner for dog lice

Abstract

An 11 yr old, 8.16 kg, spayed female Lhasa apso with unresolved pruritus was presented to the dermatology service. On physical examination, infestation of biting lice (Trichodectes canis) was discovered. The dog was treated with one dose of 100 mg fluralaner and re-evaluated at 2 and 4 wk following administration. After 2 wk, all adult lice were eliminated; however, nits were still present. After 4 wk, all clinical signs and all evidence of lice infestation were resolved. This case indicates that fluralaner is an effective treatment for biting lice, even at the lower dosage used in the 1 mo formulation.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/41448584/