The Direction of the Antibacterial Effect of Rutin Hydrate and Amikacin

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Abstract

The aim of the presented study was to examine the in vitro antimicrobial activity of rutin hydrate (RH) alone and in combination with amikacin against 12 reference strains of Gram-positive and Gram-negative bacteria. The antibacterial activity assay was evaluated in the concentration range of 2–2048 µg/mL. A serial microdilution method was used to determine the minimal inhibitory concentration (MIC) of the examined compound against reference strains. RH showed varying potential against the tested strains with MICs ranging from 128 to 1024 µg/mL. In order to examine the combinatory profile of RH and amikacin, the fractional inhibitory concentrations (FICs) were determined. The RH–amikacin combination was more active against Gram-negative bacteria where four synergism and two additive interactions were noted. For four out of six Gram-positive isolates, an indifferent effect of RH and amikacin was demonstrated, and for two strains, the tested combination had an additive effect. The results of this study showed that RH possesses antimicrobial potential in vitro towards the tested reference isolates. Moreover, it shows a promising combined effect with amikacin against Gram-negative bacteria.

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Miklasińska-Majdanik, M., Kępa, M., Wąsik, T. J., Zapletal-Pudełko, K., Klim, M., & Wojtyczka, R. D. (2023). The Direction of the Antibacterial Effect of Rutin Hydrate and Amikacin. Antibiotics, 12(9). https://doi.org/10.3390/antibiotics12091469

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