With a decreasing trend at 4 weeks post-application, the value for fipronil was 1.09 ± 0.13 ppm, and for cyphenothrin was 0.43 ± 0.28 ppm.
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Safety Evaluation of Parastar<sup>®</sup> Plus in Dogs and Assessment of Transferable Residue of Fipronil and Cyphenothrin from Dogs to Humans.
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