Synergistic anti-bacterial effects of green synthesized zinc oxide nanoparticles with levofloxacin
Abstract
Nowadays, the emergence of drug resistance was a major problem due to the limited bioavailability and unintended toxicity of antibiotics because of non-specific targeting leading to difficulty to eradicate pathogenic infections. Zinc oxide nanoparticles gain much attention as nanocarriers, due to their non-toxic, eco-friendly, and economical cost, to treat severe pathogenic infections. The purpose of this research was to produce and analyze zinc oxide nanoparticles (ZnONPs) functions using a green synthesis process to evaluate its anti-bacterial and biofilm inhibitory activities against gram-positive and -negative microorganisms. ZnONPs were formed via a green synthetic approach using a seed extract of soybean (Glycine max) and nanoparticles characterization was done using FESEM, X-ray diffraction, UV-VIS spectroscopy, and EDAX. The anti-bacterial and biofilm inhibitory activities of ZnONPs, levofloxacin, and levofloxacin-loaded ZnONPs were determined using agar disc diffusion assay and microtiter plate assay, respectively. Levofloaxcin-loaded ZnONPs showed more potent and statistically significant antibacterial activity than ZnONPs alone against Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Enterococcus faecalis. The bacterial inhibition zone of levofloxacin-loaded ZnONPs at 80 µg/ml concentrations was higher in comparison to the standard levofloxacin and ZnONPs alone which showed levofloxacin-loaded ZnONPs possess effective antibacterial activity…
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