Zoetis Simparica Trio showed higher efficacy vs NexGard Plus against resistant heartworm

A new peer-reviewed study published in Parasites & Vectors demonstrated that Zoetis' Simparica Trio provided higher efficacy against a drug-resistant heartworm isolate (ZoeLA) compared to NexGard Plus. Simparica Trio protected 3x more dogs from adult heartworm infection in the laboratory study.