Objective To observe the effect of different extracts of Pulsatilla chinensis (Bunge) Regel on Pentatrichomonas hominis from dogs. Methods The resistance of the trichomonad to five concentrations (10, 5, 2.5, 1.25 and 0.625 mg/ml) of four extracts was tested in vitro. Growth curves and percent inhibition-time curves for the five different concentrations of the four extracts were determined to analyze their effects on P. hominis. Results All five concentrations of the four extracts inhibited or killed P. hom...