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The effects of different concentrations of silver nanoparticles on metabolic activity of Leishmania tropica promastigotes both in the absence and in the presence of ultraviolet (UV) light (I, control group; II, 25 μg/mL; III, 50 μg/mL; IV, 100 μg/mL; V, 150 μg/mL; VI, 200 μg/mL).
