Peer-reviewed veterinary case report
Simparica Trio kills fleas and stops tapeworms in dogs for a month
By Weaver, Lindsay et al.Ā·Published in Parasites & vectorsĀ·2025Ā·Zoetis, United StatesĀ·View original on PubMed ā
PetCaseFinder translated the abstract of this peer-reviewed paper into plain English so pet owners can read it. We do not publish original research ā every detail traces back to the citation above. How we work ā
Original publication title: Simparica Triokills Ctenocephalides felis on dogs and provides month-long protection against the transmission of Dipylidium caninum.
- Species:
- dog
Plain-English summary
A group of dogs was tested to see if a new medication called Simparica Trio could prevent flea infestations and the tapeworm Dipylidium caninum, which dogs can get from eating infected fleas. The dogs that received Simparica Trio showed no fleas and had significantly lower levels of the tapeworm compared to those that did not receive the treatment. This medication was effective for a full month after just one dose, keeping the dogs free from fleas and the tapeworm.
People also search for: dog flea treatment Ā· Simparica Trio for tapeworms Ā· how to prevent fleas in dogs
Abstract
BACKGROUND: The cestode Dipylidium caninum is known to infect dogs via the ingestion of an intermediate flea host, typically Ctenocephalides felis. Simparica Triois an oral combination drug product for dogs effective in the treatment and prevention of fleas, including C. felis. Here, we report two laboratory studies evaluating the efficacy of a single administration of Simparica Trio at the minimum label dosage of 1.2 mg/kg sarolaner, 24 µg/kg moxidectin, and 5 mg/kg pyrantel (as pamoate salt) in preventing D. caninum infection in dogs for 1 month through killing of C. felis. METHODS: A total of 20 dogs (n = 10 per group) proven to be suitable hosts for C. felis were used in each of the two studies. Treatment occurred on day 0, with each dog given either the placebo or Simparica Trio. On days 0 (after treatment), 7, 14, 21, and 30, dogs were infested using 200 (± 5) unfed D. caninum-infected C. felis. Live flea counts were conducted on day 33 (72 ± 2 h after day 30 infestation). All dogs were euthanized on day 58, and each dog was necropsied for the recovery of D. caninum scolexes from the gastrointestinal tract. RESULTS: Placebo-treated dogs had adequate flea infestations and cestode infections in both studies. Simparica-Trio-treated dogs were free of fleas on day 33 (100% efficacy) and had significantly lower mean flea counts compared with placebo-treated dogs (P ≤ 0.0007). Scolex counts in Simparica-Trio-treated dogs were also significantly decreased compared with placebo-treated dogs in both studies. The efficacy of Simparica Trio against D. caninum based on least squares mean scolex counts was 100% (P < 0.0001) in study 1 and 92.1% (P = 0.0033) in study 2. CONCLUSIONS: The efficacy provided by Simparica Trio against C. felis at the minimum dosage of 1.2 mg/kg sarolaner, 24 µg/kg moxidectin, and 5 mg/kg pyrantel (as pamoate salt) prevented D. caninum infection in dogs for 1 month.
Find similar cases for your pet
PetCaseFinder finds other peer-reviewed reports of pets with the same symptoms, plus a plain-English summary of what was tried across them.
Search related cases āOriginal publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/41310701/