Antimicrobial activity of different tea varieties available in Pakistan

Pak J Pharm Sci. 2015 Nov;28(6):2091-4.


In this antimicrobial study, various extracts of Green and Black tea (Camellia sinensis) and Lemon grass (Cymbopogon citrates) were evaluated for antimicrobial activities against six bacterial strains including both human pathogenic bacteria (Escherichia coli, Pseudomonas aeuroginosa, Staphylococcus aureus and Salmonella typhi) and plant pathogenic bacteria (Erwinia carotovora, Agro bacterium tumifaciens) and one fungal strain Candida albicans by disc diffusion susceptibility method. Of human pathogens, P. aeruginosa was most susceptible to all three different tea varieties; though rest of the strains also demonstrated prominent sensitivity. In comparison, black tea extracts were less activities than green tea and lemon grass. However, all the three tea varieties illustrated profound activity against plant pathogenic bacteria. Similarly, when extracts of tea were tested against C. albicans, green tea and lemon grass exhibited significant activity while black tea was mostly inactive.

Publication types

  • Comparative Study

MeSH terms

  • Anti-Bacterial Agents / isolation & purification
  • Anti-Bacterial Agents / pharmacology*
  • Antifungal Agents / isolation & purification
  • Antifungal Agents / pharmacology*
  • Bacteria / drug effects
  • Bacteria / growth & development
  • Camellia sinensis* / chemistry
  • Camellia sinensis* / classification
  • Candida albicans / drug effects
  • Candida albicans / growth & development
  • Cymbopogon* / chemistry
  • Disk Diffusion Antimicrobial Tests
  • Pakistan
  • Phytotherapy
  • Plant Extracts / isolation & purification
  • Plant Extracts / pharmacology*
  • Plant Leaves
  • Plants, Medicinal


  • Anti-Bacterial Agents
  • Antifungal Agents
  • Plant Extracts