Preventive efficacy of six monthly doses of NexGard® PLUS or Simparica Trio® against a macrocyclic lactone-resistant isolate (JYD-34) of Dirofilaria immitis and of a single dose of NexGard PLUS against a susceptible isolate
2024

Efficacy of NexGard® PLUS and Simparica Trio® against Heartworm Disease

Sample size: 38 publication Evidence: high

Author Information

Author(s): Prullage Joseph, Frost Justin, DiCosty Utami, Martin Elizabeth, Dumont Pascal, Yoon Stephen, Süssenberger Ricarda

Primary Institution: Boehringer Ingelheim Animal Health

Hypothesis

How effective are NexGard® PLUS and Simparica Trio® in preventing heartworm disease caused by resistant and susceptible isolates?

Conclusion

NexGard® PLUS and Simparica Trio® are highly effective in preventing heartworm disease, with NexGard® PLUS showing 100% efficacy against a susceptible isolate.

Supporting Evidence

  • NexGard® PLUS showed 99.5% efficacy against a resistant heartworm isolate.
  • Simparica Trio® showed 99.8% efficacy against the same resistant isolate.
  • NexGard® PLUS was 100% effective against a susceptible heartworm isolate.

Takeaway

This study shows that two medications can help prevent heartworm disease in dogs, even when the worms are resistant to some treatments.

Methodology

Two studies were conducted with dogs randomly assigned to treatment groups, receiving either NexGard® PLUS or Simparica Trio® over several months, followed by necropsy to assess heartworm presence.

Potential Biases

Potential bias due to the involvement of the manufacturer in the study design and funding.

Limitations

The studies were conducted in controlled environments, which may not fully represent real-world conditions.

Participant Demographics

Eighteen healthy Beagle dogs in study 1 and twenty healthy Beagle dogs in study 2, with a mix of male and female dogs.

Statistical Information

P-Value

<0.0001

Statistical Significance

p<0.0001

Digital Object Identifier (DOI)

10.1186/s13071-024-06603-z

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