Related Experiment Video

Updated: Jun 27, 2026

Extraction and Analysis of Taiwanese Green Propolis
06:50

Extraction and Analysis of Taiwanese Green Propolis

Published on: January 7, 2019

Antibacterial effects of water soluble green tea extracts on multi-antibiotic resistant isolates of Acinetobacter sp

N Hosseini Jazani1, Sh Shahabi, A Abdi Ali

  • 1Department of Microbiology, Immunology and Genetics, Faculty of Medicine, Urmia Medical Sciences University, Urmia, Iran.

Pakistan Journal of Biological Sciences : PJBS
|December 17, 2008
PubMed

Insights

Green tea extract demonstrates significant antibacterial effects against multi-drug resistant Acinetobacter strains found in burn wound infections. This natural compound offers a promising bactericidal action for combating resistant bacterial infections.

Area of Science:

  • Microbiology
  • Pharmacology
  • Natural Product Research

Background:

  • Acinetobacter species are opportunistic pathogens frequently isolated from hospital-acquired infections.
  • Multi-drug resistance (MDR) in Acinetobacter poses a significant challenge in clinical settings, particularly in burn wound infections.
  • Conventional antibiotic therapies are becoming less effective against MDR Acinetobacter strains.

Purpose of the Study:

  • To evaluate the antibacterial activity of water-soluble green tea extract against clinical isolates of Acinetobacter.
  • To determine the Minimum Bactericidal Concentrations (MBCs) of green tea extract against MDR Acinetobacter strains.
  • To assess the potential of green tea as a therapeutic agent against Acinetobacter infections.

Main Methods:

  • Isolation and identification of Acinetobacter strains from burn wound samples.
  • Antibiotic susceptibility testing using the agar disk diffusion method.
  • Determination of Minimum Bactericidal Concentrations (MBCs) for green tea extract.

Main Results:

  • All 20 isolated Acinetobacter strains were identified as Multi-drug Resistant (MDR).
  • Seventy-five percent of strains exhibited resistance to 12 or more antibiotics.
  • The average MBC of green tea extract against Acinetobacter strains was 387.5 +/- 127.6 microg/mL.

Conclusions:

  • Water-soluble green tea extract exhibits significant bactericidal activity against MDR Acinetobacter.
  • Green tea extract represents a potential natural alternative for treating infections caused by resistant Acinetobacter strains.
  • Further research into green tea's antibacterial mechanisms and clinical efficacy is warranted.

Related Concept Videos

Antimicrobial Effectiveness01:28

Antimicrobial Effectiveness

The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...
Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...
Combined Effects of Drugs: Synergism01:27

Combined Effects of Drugs: Synergism

Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...