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Bactericidal and Antibiotic Synergistic Effect of Nanosilver Against Methicillin-Resistant Staphylococcus aureus

Khalid A Ali Abdel Rahim1, Ahmed Mohamed Ali Mohamed2

  • 1Botany and Microbiology Department, College of Sciences, King Saud University, Riyadh, Saudi Arabia; Botany Department, Central Laboratory of Genetic Engineering, Faculty of Sciences, Sohag University, Sohag, Egypt.

Jundishapur Journal of Microbiology
|February 11, 2016
PubMed
Abstract

Insights

Silver nanoparticles (Ag-NPs) show potent bactericidal activity against Methicillin-Resistant Staphylococcus aureus (MRSA). Ag-NPs can be used as an alternative or in combination with antibiotics to treat dangerous MRSA infections.

Area of Science:

  • Nanotechnology
  • Microbiology
  • Infectious Diseases

Background:

  • Methicillin-Resistant Staphylococcus aureus (MRSA) causes difficult-to-treat infections.
  • MRSA strains are resistant to standard antibiotics, posing a significant health risk.

Purpose of the Study:

  • To evaluate the bactericidal effects of silver nanoparticles (Ag-NPs) against MRSA.
  • To assess the synergistic antibiotic effects of Ag-NPs in combination with existing antibiotics against MRSA.

Main Methods:

  • MRSA strains were isolated and identified from clinical samples.
  • Minimum inhibitory concentration (MIC) and time-kill assays were performed for Ag-NPs.
  • Efficacy of Ag-NPs and combinations against biofilms was evaluated using tissue culture plates.

Main Results:

  • The MIC of Ag-NPs against MRSA was determined to be 100 μg/mL.
  • Ag-NPs at concentrations of 50-200 µg/mL significantly inhibited MRSA growth, leading to cell death within four hours.
  • Combinations of Ag-NPs and antibiotics demonstrated effectiveness against MRSA, unlike ampicillin alone.

Conclusions:

  • Silver nanoparticles exhibit high therapeutic potential against MRSA.
  • Ag-NPs can be considered as a viable alternative or adjuvant therapy for MRSA treatment.
  • Further research is needed to explore synergistic mechanisms and assess the safety and efficacy of novel Ag-NP antibiotic combinations.
Keywords:
Ag-NPsAntibioticsMethicillin-Resistant Staphylococcus aureusNanosilver

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