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

Antimicrobial activity of different tea varieties available in Pakistan.

Author information

Department of Chemistry, Kohat University of Science and Technology Kohat, Pakistan.
Department of pharmacy, Abdul Wali Khan University Mardan, Pakistan.
Medicinal Botanic Center, PCSIR Labs Complex Peshawar, Institute of Chemical Sciences, University of Peshawar, Pakistan.


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.

[Indexed for MEDLINE]

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