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Efficacy of a topical ectoparasiticide containing dinotefuran, pyriproxyfen, and permethrin against Amblyomma americanum (Lone Star tick) and Amblyomma maculatum (Gulf Coast tick) on dogs.

Author(s): Coyne MJ

Affiliation(s): Summit VetPharm, Fort Lee, NJ 07024, USA.

Publication date & source: 2009-03, Vet Ther., 10(1-2):17-23.

Publication type: Randomized Controlled Trial; Research Support, Non-U.S. Gov't

Amblyomma americanum (lone star tick) and Amblyomma maculatum (Gulf Coast tick) are important disease vectors for both dogs and humans. This article describes two studies conducted to evaluate the efficacy of a new topical spot-on ectoparasiticide containing dinotefuran, permethrin, and pyriproxyfen (Vectra 3D, Summit VetPharm) against A. maculatum and A. americanum in dogs. Dogs were treated on day 0 and infested on days -1, 7, 14, 21, and 28 with approximately 40 ticks each day. Live tick counts were determined 48 hours after infestation. Treatment with Vectra 3D resulted in a significant reduction in A. maculatum tick counts throughout the study period. For A. americanum, there was a significant reduction in tick counts from study day 9 onward. The results of this study indicate that Vectra 3D can be used as an effective part of an overall tick- and vector-borne disease control strategy on dogs when used monthly.

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